Updated on 2025/12/23

写真a

 
KOBAYASHI Tatsuo
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Professor
Position
Professor
External link

Degree

  • Doctor (Science) ( Osaka University )

Research Interests

  • High field

  • 極限物性

  • 超伝導

  • magnetism

  • High pressure

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

Education

  • Osaka University   大学院基礎工学研究科  

    1986.4 - 1988.3

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    Country: Japan

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  • Kobe University   理学部   物理学科

    1981.4 - 1985.3

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    Country: Japan

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Research History

  • Graduate School of Natural Science and Technology, Okayama University   Professor

    2003.4

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    Country:Japan

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  • Research Center for Materials Science at Extreme Conditions   Associate Professor

    1996.5 - 2003.3

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  • Graduate School of Engineering Science, Osaka University   Research Associate

    1990.10 - 1996.4

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  • School of Liberal Arts, Kobe University   Research Associate

    1988.4 - 1990.9

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Professional Memberships

 

Papers

  • Topological Hall Effect in PrSb2 Reviewed

    Shingo Araki, Hinata Izumida, Kazuto Akiba, Tatsuo C. Kobayashi, Takashi Kambe

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   94 ( 11 )   2025.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.94.113703

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  • Structural and Superconducting Properties of Bi2Rh3(Se1–xSx)2 (x = 0–1.0) Reviewed

    Zhiyan Zhang, Wanli Pan, Masaki Utsumi, Yuki Yamamoto, Hidenori Goto, Ryusuke Kondo, Takayoshi Yokoya, Ryota Goban, Tomoki Higashikawa, Ritsuko Eguchi, Yasuhiro Takabayashi, Koichi Hayashi, Hirofumi Ishii, Tatsuo C. Kobayashi, Yoshihiro Kubozono

    Inorganic Chemistry   63 ( 45 )   21531 - 21540   2024.10

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    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.4c03637

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  • Ferrimagnetic structure in the high-pressure phase of α−Mn Reviewed

    Shingo Araki, Kaisei Iwamoto, Kazuto Akiba, Tatsuo C. Kobayashi, Koji Munakata, Koji Kaneko, Toyotaka Osakabe

    Physical Review B   2024.9

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.110.094420

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  • Realization of nodal-ring semimetal in pressurized black phosphorus Reviewed

    Kazuto Akiba, Yuichi Akahama, Masashi Tokunaga, Tatsuo C. Kobayashi

    Physical Review B   109 ( 20 )   2024.5

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    Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevb.109.l201103

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.109.L201103/fulltext

  • Zero-Field NMR of α-Mn up to 5GPa Reviewed

    Go Fujita, Fumiya Kawanabe, Hideto Fukazawa, Tetsuo Ohama, Yoh Kohori, Kentaro Kitagawa, Kaisei Iwamoto, Shingo Araki, Tatsuo C. Kobayashi

    Journal of the Physical Society of Japan   93 ( 2 )   2024.2

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.93.023707

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  • Pressure Dependence of the Structural and Superconducting Properties of the Bi-Based Superconductor Bi2Pd3Se2 Reviewed

    Zhiyan Zhang, Mitsuki Ikeda, Masaki Utsumi, Yuki Yamamoto, Hidenori Goto, Ritsuko Eguchi, Yen-Fa Liao, Hirofumi Ishii, Yasuhiro Takabayashi, Koichi Hayashi, Ryusuke Kondo, Tatsuo C. Kobayashi, Yoshihiro Kubozono

    Inorganic Chemistry   63 ( 5 )   2553 - 2561   2024.1

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    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.3c03737

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  • Superconductivity in a ferroelectric-like topological semimetal SrAuBi Reviewed

    Hidefumi Takahashi, Tomohiro Sasaki, Akitoshi Nakano, Kazuto Akiba, Masayuki Takahashi, Alex H. Mayo, Masaho Onose, Tatsuo C. Kobayashi, Shintaro Ishiwata

    npj Quantum Materials   8 ( 1 )   2023.12

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Given the rarity of metallic systems that exhibit ferroelectric-like transitions, it is apparently challenging to find a system that simultaneously possesses superconductivity and ferroelectric-like structural instability. Here, we report the observation of superconductivity at 2.4 K in a layered semimetal SrAuBi characterized by strong spin–orbit coupling (SOC) and ferroelectric-like lattice distortion. Single crystals of SrAuBi have been successfully synthesized and found to show a polar-nonpolar structure transition at 214 K, which is associated with the buckling of Au-Bi honeycomb lattice. On the basis of the band calculations considering SOC, we found significant Rashba-type spin splitting and symmetry-protected multiple Dirac points near the Fermi level. We believe that this discovery opens up new possibilities of pursuing exotic superconducting states associated with the semimetallic band structure without space inversion symmetry and the topological surface state with the strong SOC.

    DOI: 10.1038/s41535-023-00612-4

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    Other Link: https://www.nature.com/articles/s41535-023-00612-4

  • Phonon-mediated superconductivity in the Sb square-net compound LaCuSb2 Reviewed

    Kazuto Akiba, Tatsuo C. Kobayashi

    Phys. Rev. B   107   245117   2023.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.107.245117

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  • NMR Study of α-Mn Exhibiting Anomalous Hall Effect under High Pressure Reviewed

    H. Fukazawa, G. Fujita, N. Shioda, T. Ohama, Y. Kohori, K. Iwamoto, S. Araki, T. C. Kobayashi

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   2023.5

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.38.011071

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  • Effect of High Pressure on the Electrical Resistivity of Electric Toroidal Ordering Candidate Ca5Ir3O12 Reviewed

    Kazuto Akiba, Tatsuo C. Kobayashi, Momoka Hayashida, Kazuyuki Matsuhira

    Journal of the Physical Society of Japan   92 ( 3 )   2023.3

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    Publishing type:Research paper (scientific journal)   Publisher:Physical Society of Japan  

    DOI: 10.7566/jpsj.92.035002

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  • Superconductivity in a Magnetic Rashba Semimetal EuAuBi Reviewed

    Hidefumi Takahashi, Kazuto Akiba, Masayuki Takahashi, Alex H. Mayo, Masayuki Ochi, Tatsuo C. Kobayashi, Shintaro Ishiwata

    Journal of the Physical Society of Japan   92 ( 1 )   2023.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Physical Society of Japan  

    DOI: 10.7566/jpsj.92.013701

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  • Site Split of Antiferromagnetic α-Mn Revealed by 55Mn Nuclear Magnetic Resonance Reviewed

    Masahiro Manago, Gaku Motoyama, Shijo Nishigori, Kenji Fujiwara, Katsuki Kinjo, Shunsaku Kitagawa, Kenji Ishida, Kazuto Akiba, Shingo Araki, Tatsuo C. Kobayashi, Hisatomo Harima

    Journal of the Physical Society of Japan   91 ( 11 )   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Physical Society of Japan  

    DOI: 10.7566/jpsj.91.113701

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  • Observation of superconductivity and its enhancement at the charge density wave critical point in LaAgSb2 Reviewed

    Kazuto Akiba, Nobuaki Umeshita, Tatsuo C. Kobayashi

    PHYSICAL REVIEW B   106 ( 16 )   2022.10

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.106.L161113

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  • Solid and Liquid Oxygen under Ultrahigh Magnetic Fields Reviewed

    Toshihiro Nomura, Yasuhiro H. Matsuda, Tatsuo C. Kobayashi

    Oxygen   2 ( 2 )   152 - 163   2022.5

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    Oxygen is a unique molecule that possesses a spin quantum number S=1. In the condensed phases of oxygen, the delicate balance between the antiferromagnetic interaction and van der Waals force results in the various phases with different crystal structures. By applying ultrahigh magnetic fields, the antiferromagnetic coupling between O2 molecules breaks, and novel high-field phases can appear. We have investigated the physical properties of condensed oxygen under ultrahigh magnetic fields and have found that the stable crystal structure of solid oxygen changes around 100 T. Even in liquid oxygen, we observed a strong acoustic attenuation, which indicates the fluctuation of local molecular arrangements. These results demonstrate that magnetic fields can modulate the packing structure of oxygen through spin-lattice coupling. Our study implies the possibility of controlling oxygen-related (bio-)chemical processes by using an external magnetic field.

    DOI: 10.3390/oxygen2020013

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  • Magnetotransport studies of the Sb square-net compound LaAgSb2 under high pressure and rotating magnetic fields Reviewed

    Kazuto Akiba, Nobuaki Umeshita, Tatsuo C. Kobayashi

    Physical Review B   105 ( 3 )   2022.1

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevb.105.035108

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.105.035108/fulltext

  • Physical properties of liquid oxygen under ultrahigh magnetic fields Reviewed

    T. Nomura, A. Ikeda, M. Gen, A. Matsuo, K. Kindo, Y. Kohama, Y. H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda, T. C. Kobayashi

    Physical Review B   104 ( 22 )   2021.12

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevb.104.224423

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.104.224423/fulltext

  • Spin-gap formation due to spin-Peierls instability in π-orbital-ordered NaO2 Reviewed International journal

    Mizuki Miyajima, Fahmi Astuti, Takahito Fukuda, Masashi Kodani, Shinsuke Iida, Shinichiro Asai, Akira Matsuo, Takatsugu Masuda, Koichi Kindo, Takumi Hasegawa, Tatsuo C. Kobayashi, Takehito Nakano, Isao Watanabe, Takashi Kambe

    Physical Review B   104 ( 14 )   2021.10

  • Successive destruction of charge density wave states by pressure in LaAgSb2 Reviewed

    Kazuto Akiba, Hiroaki Nishimori, Nobuaki Umeshita, Tatsuo C. Kobayashi

    Physical Review B   103 ( 8 )   2021.2

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    Authorship:Last author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/physrevb.103.085134

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.103.085134/fulltext

  • Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7 Reviewed

    Satoshi Tajima, Daigorou Hirai, Yuto Kinoshita, Masashi Tokunaga, Kazuto Akiba, Tatsuo C. Kobayashi, Hishiro T. Hirose, Zenji Hiroi

    Journal of the Physical Society of Japan   89 ( 11 )   114711 - 114711   2020.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/jpsj.89.114711

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  • Anomalous Hall effect triggered by pressure-induced magnetic phase transition in α -Mn Reviewed

    Kazuto Akiba, Kaisei Iwamoto, Takaaki Sato, Shingo Araki, Tatsuo C. Kobayashi

    Physical Review Research   2 ( 4 )   2020.10

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    DOI: 10.1103/physrevresearch.2.043090

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.2.043090/fulltext

  • Two Qualitatively Different Superconducting Phases under High Pressure in Single-Crystalline CeNiGe3 Reviewed

    Shunsaku Kitagawa, Shingo Araki, Tatsuo C. Kobayashi, Yoichi Ikeda

    Journal of the Physical Society of Japan   89 ( 6 )   063702 - 063702   2020.6

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    DOI: 10.7566/jpsj.89.063702

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  • Magnetotransport properties of tellurium under extreme conditions Reviewed

    Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, Masashi Tokunaga

    Physical Review B   101 ( 24 )   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/physrevb.101.245111

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.101.245111/fulltext

  • Variation in Superconducting Symmetry Against Pressure on Noncentrosymmetric Superconductor Cd2Re2O7 Revealed by 185/187Re Nuclear Quadrupole Resonance Reviewed

    Shunsaku Kitagawa, Kenji Ishida, Tatsuo C. Kobayashi, Yasuhito Matsubayashi, Daigorou Hirai, Zenji Hiroi

    Journal of the Physical Society of Japan   89 ( 5 )   053701 - 053701   2020.5

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    DOI: 10.7566/jpsj.89.053701

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  • Pressure-Temperature Phase Diagram of alpha-Mn Reviewed International journal

    Takaaki Sato, Kazuto Akiba, Shingo Araki, Tatsuo C. Kobayashi

    Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)   30   011030-1 - 011030-6   2020.3

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    Authorship:Last author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.30.011030

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  • Helimagnetic Structure and Heavy-Fermion-Like Behavior in the Vicinity of the Quantum Critical Point in Mn3P Reviewed

    Hisashi Kotegawa, Masaaki Matsuda, Feng Ye, Yuki Tani, Kohei Uda, Yoshiki Kuwata, Hideki Tou, Eiichi Matsuoka, Hitoshi Sugawara, Takahiro Sakurai, Hitoshi Ohta, Hisatomo Harima, Keiki Takeda, Junichi Hayashi, Shingo Araki, Tatsuo C. Kobayashi

    Physical Review Letters   124 ( 8 )   2020.2

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/physrevlett.124.087202

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.124.087202/fulltext

  • High magnetic field x-ray diffraction study of the α phase of solid oxygen: Absence of giant magnetostriction Reviewed

    Yasuhiro H. Matsuda, Ayumi Shimizu, Akihiko Ikeda, Toshihiro Nomura, Takeshi Yajima, Toshiya Inami, Kohki Takahashi, Tatsuo C. Kobayashi

    Physical Review B   100 ( 21 )   2019.12

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    DOI: 10.1103/physrevb.100.214105

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.100.214105/fulltext

  • Interplay between unconventional superconductivity and heavy-fermion quantum criticality: CeCu2Si2 versus YbRh2Si2 Reviewed

    M. Smidman, O. Stockert, J. Arndt, G. M. Pang, L. Jiao, H. Q. Yuan, H. A. Vieyra, S. Kitagawa, K. Ishida, K. Fujiwara, T. C. Kobayashi, E. Schuberth, M. Tippmann, L. Steinke, S. Lausberg, A. Steppke, M. Brando, H. Pfau, U. Stockert, P. Sun, S. Friedemann, S. Wirth, C. Krellner, S. Kirchner, E. M. Nica, R. Yu, Q. Si, F. Steglich

    Philosophical Magazine   98 ( 32 )   2930 - 2963   2018.11

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    DOI: 10.1080/14786435.2018.1511070

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  • Pyrochlore Oxide Superconductor Cd2Re2O7Revisited Reviewed

    Zenji Hiroi, Jun-ichi Yamaura, Tatsuo C. Kobayashi, Yasuhito Matsubayashi, Daigorou Hirai

    Journal of the Physical Society of Japan   87 ( 2 )   024702 - 024702   2018.2

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    DOI: 10.7566/jpsj.87.024702

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  • Magnetostriction studies up to megagauss fields using fiber Bragg grating technique

    Akihiko Ikeda, Yasuhiro H. Matsuda, Daisuke Nakamura, Shojiro Takeyama, Hiroshi Tsuda, Kazuya Nomura, Ayumi Shimizu, Akira Matsuo, Toshihiro Nomura, Tatsuo C. Kobayashi, Takeshi Yajima, Hajime Ishikawa, Zenji Hiroi, Masahiko Isobe, Touru Yamauchi, Keisuke Sato

    2018 16TH INTERNATIONAL CONFERENCE ON MEGAGAUSS MAGNETIC FIELD GENERATION AND RELATED TOPICS (MEGAGAUSS)   98 - 106   2018

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  • Pressure-Induced Superconductivity from Doping-Induced Antiferromagnetic Phase of 112-type Ca1−xLaxFeAs2 Reviewed

    Shunsaku Kitagawa, Taishi Sekiya, Yo Fujiyoshi, Shingo Araki, Tatsuo C. Kobayashi, Naoki Nishimoto, Tasuku Mizukami, Satoshi Ioka, Kazunori Fujimura, Kazutaka Kudo, Minoru Nohara

    Journal of the Physical Society of Japan   86 ( 11 )   113705 - 113705   2017.11

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    DOI: 10.7566/jpsj.86.113705

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  • H-T phase diagram of solid oxygen Reviewed

    T. Nomura, Y. H. Matsuda, T. C. Kobayashi

    PHYSICAL REVIEW B   96 ( 5 )   2017.8

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    DOI: 10.1103/PhysRevB.96.054439

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  • alpha-beta and beta-gamma phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect Reviewed

    Toshihiro Nomura, Yoshimitsu Kohama, Yasuhiro H. Matsuda, Koichi Kindo, Tatsuo C. Kobayashi

    Phys Rev B   5   104420   2017.3

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  • Successive spatial symmetry breaking under high pressure in the spin-orbit-coupled metal Cd2Re2O7 Reviewed

    Jun-ichi Yamaura, Keiki Takeda, Yoichi Ikeda, Naohisa Hirao, Yasuo Ohishi, Tatsuo C. Kobayashi, Zenji Hiroi

    PHYSICAL REVIEW B   95 ( 2 )   163 - 170   2017.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.95.020102

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  • Chemical analysis of superconducting phase in K-doped picene Reviewed

    Takashi Kambe, Saki Nishiyama, Huyen L. T. Nguyen, Takahiro Terao, Masanari Izumi, Yusuke Sakai, Lu Zheng, Hidenori Goto, Yugo Itoh, Taiki Onji, Tatsuo C. Kobayashi, Hisako Sugino, Shin Gohda, Hideki Okamoto, Yoshihiro Kubozono

    JOURNAL OF PHYSICS-CONDENSED MATTER   28 ( 44 )   2016.11

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    DOI: 10.1088/0953-8984/28/44/444001

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  • Irreversible Heating Measurement with Microsecond Pulse Magnet: Example of the alpha-theta Phase Transition of Solid Oxygen Reviewed

    Toshihiro Nomura, Yasuhiro H. Matsuda, Shojiro Takeyama, Tatsuo C. Kobayashi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   85 ( 9 )   2016.9

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    DOI: 10.7566/JPSJ.85.094601

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  • Characteristic Fermi surfaces and charge density wave in SrAl4 and related compounds with the BaAl4-type tetragonal structure Reviewed

    Ai Nakamura, Taro Uejo, Hisatomo Harima, Shingo Araki, Tatsuo C. Kobayashi, Miho Nakashima, Yasushi Amako, Masato Hedo, Takao Nakama, Yoshichika Onuki

    JOURNAL OF ALLOYS AND COMPOUNDS   654   290 - 299   2016.1

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    DOI: 10.1016/j.jallcom.2015.08.193

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  • Hall Effect in CeIn3 under High Pressure Reviewed

    Shingo Araki, Taiki Onji, Shunsaku Kitagawa, Tatsuo C. Kobayashi, Takashi Kambe

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 12 )   123702-1-123702-4   2015.12

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    DOI: 10.7566/JPSJ.84.123702

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  • Suppression of Nonmagnetic Insulating State by Application of Pressure in Mineral Tetrahedrite Cu12Sb4S13 Reviewed

    Shunsaku Kitagawa, Taishi Sekiya, Shingo Araki, Tatsuo C. Kobayashi, Kenji Ishida, Takashi Kambe, Takumi Kimura, Naoki Nishimoto, Kazutaka Kudo, Minoru Nohara

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 9 )   093701-1-093701-4   2015.9

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    DOI: 10.7566/JPSJ.84.093701

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  • Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields Reviewed

    T. Nomura, Y. H. Matsuda, S. Takeyama, A. Matsuo, K. Kindo, T. C. Kobayashi

    Physical Review B - Condensed Matter and Materials Physics   92 ( 6 )   2015.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.92.064109

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  • Emergence of double-dome superconductivity in ammoniated metal-doped FeSe Reviewed

    Masanari Izumi, Lu Zheng, Yusuke Sakai, Hidenori Goto, Masafumi Sakata, Yuki Nakamoto, Huyen L. T. Nguyen, Tomoko Kagayama, Katsuya Shimizu, Shingo Araki, Tatsuo C. Kobayashi, Takashi Kambe, Dachun Gu, Jing Guo, Jing Liu, Yanchun Li, Liling Sun, Kosmas Prassides, Yoshihiro Kubozono

    SCIENTIFIC REPORTS   5   9477-1-9477-7   2015.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/srep09477

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  • Pressure-Temperature-Field Phase Diagram in the Ferromagnet U3P4 Reviewed

    Shingo Araki, Minami Hayashida, Naoto Nishiumi, Hiroki Manabe, Yoichi Ikeda, Tatsuo C. Kobayashi, Keizo Murata, Yoshihiko Inada, Piotr Wisniewski, Dai Aoki, Yoshichika Onuki, Etsuji Yamamoto, Yoshinori Haga

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 2 )   024705-1-024705-8   2015.2

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    DOI: 10.7566/JPSJ.84.024705

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  • Resistance Anomalies Accompanying Crossover from Heavy-Fermion Regime to Intermediate-Valence Regime: A Study of Cu-Ni Substitution and Pressure Effects on CeCu2Si2 Reviewed

    Yoichi Ikeda, Yuzo Ito, Shingo Araki, Tatsuo C. Kobayashi, Hideki Yoshizawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   84 ( 2 )   024702-1-024702-9   2015.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.84.024702

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  • Characterization of Ferromagnetic Order in CePd2P2 Reviewed

    Y. Ikeda, H. Yoshizawa, S. Konishi, S. Araki, T. C. Kobayashi, T. Yokoo, S. Ito

    INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014)   592   012013-1-012013-6   2015

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    DOI: 10.1088/1742-6596/592/1/012013

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  • Simultaneous suppression of superconductivity and structural phase transition under pressure in Ca-10(Ir4As8)(Fe2-xIrxAs2)(5) Reviewed

    Shunsaku Kitagawa, Shingo Araki, Tatsuo C. Kobayashi, Hiroyuki Ishii, Kazunori Fujimura, Daisuke Mitsuoka, Kazutaka Kudo, Minoru Nohara

    PHYSICAL REVIEW B   90 ( 22 )   224513-1-224513-4   2014.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.90.224513

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  • Role of Valence Fluctuations in the Superconductivity of Ce122 Compounds Reviewed

    H. Yamaoka, Y. Ikeda, I. Jarrige, N. Tsujii, Y. Zekko, Y. Yamamoto, J. Mizuki, J. -F. Lin, N. Hiraoka, H. Ishii, K. -D. Tsuei, T. C. Kobayashi, F. Honda, Y. Onuki

    PHYSICAL REVIEW LETTERS   113 ( 8 )   86403-1-86403-6   2014.8

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    DOI: 10.1103/PhysRevLett.113.086403

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  • Novel Phase of Solid Oxygen Induced by Ultrahigh Magnetic Fields Reviewed

    T. Nomura, Y. H. Matsuda, S. Takeyama, A. Matsuo, K. Kindo, J. L. Her, T. C. Kobayashi

    PHYSICAL REVIEW LETTERS   112 ( 24 )   247201-1-247201-5   2014.6

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    DOI: 10.1103/PhysRevLett.112.247201

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  • Orbital Zeeman Effect of Liquid Oxygen in High Magnetic Fields Reviewed

    Toshihiro Nomura, Yasuhiro H. Matsuda, Shojiro Takeyama, Akira Matsuo, Koichi Kindo, Tatsuo C. Kobayashi

    Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)   2014.6

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    DOI: 10.7566/jpscp.3.017004

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  • Superconducting phases in (NH3)(y)MxFeSe1-zTez (M = Li, Na, and Ca) Reviewed

    Yusuke Sakai, Lu Zheng, Masanari Izumi, Kazuya Teranishi, Ritsuko Eguchi, Hidenori Goto, Taiki Onji, Shingo Araki, Tatsuo C. Kobayashi, Yoshihiro Kubozono

    PHYSICAL REVIEW B   89 ( 14 )   144509-1-144509-6   2014.4

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    DOI: 10.1103/PhysRevB.89.144509

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  • Charge Density Wave Transition in EuAl4 Reviewed

    Shingo Araki, Yoichi Ikeda, Tatsuo C. Kobayashi, Ai Nakamura, Yuichi Hiranaka, Masato Hedo, Takao Nakama, Yoshichika Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   83 ( 1 )   015001-1-015001-2   2014.1

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    DOI: 10.7566/JPSJ.83.015001

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  • Emergence of novel phase of solid oxygen in ultrahigh magnetic field Reviewed

    T. C. Kobayashi, T. Nomura, Y. H. Matsuda, J. L. Her, S. Takeyama, A. Matsuo, K. Kindo

    27TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT27), PTS 1-5   568   42018-1-42018-6   2014

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    DOI: 10.1088/1742-6596/568/4/042018

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  • Pressure-Induced Magnetic Transition and Disappearance of Superconductivity in CeNiGe3 Reviewed

    Yoichi Ikeda, Takeshi Tomijima, Shingo Araki, Tatsuo C. Kobayashi, Keizo Murata

    JPS Conference Proceedings   3   015044-1-015044-6   2014

  • Metamagnetic Transition of Itinerant Ferromagnet U3P4under High Pressure Reviewed

    Shingo Araki, Minami Hayashida, Naoto Nishiumi, Hiroki Manabe, Yoichi Ikeda, Tatsuo C. Kobayashi, Keizo Murata, Yoshihiko Inada, Piotr Wiśniewski, Dai Aoki, Yoshichika Ōnuki, Etsuji Yamamoto, Yoshinori Haga

    Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)   3   011081-1-011081-6   2014

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    DOI: 10.7566/JPSCP.3.011081

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  • Valence Crossover of Ce Ions in CeCu2Si2 under High Pressure - Pressure Dependence of the Unit Cell Volume and the NQR Frequency Reviewed

    Tatsuo C. Kobayashi, Kenji Fujiwara, Keiki Takeda, Hisatomo Harima, Yoichi Ikeda, Takafumi Adachi, Yasuo Ohishi, Christoph Geibel, Frank Steglich

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   82 ( 11 )   114701-1-6   2013.11

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    DOI: 10.7566/JPSJ.82.114701

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  • Superconductivity in (NH3)yCs0.4FeSe Reviewed

    Lu Zheng, Masanari Izumi, Yusuke Sakai, Ritsuko Eguchi, Hidenori Goto, Yasuhiro Takabayashi, Takashi Kambe, Taiki Onji, Shingo Araki, Tatsuo C. Kobayashi, Jungeun Kim, Akihiko Fujiwara, Yoshihiro Kubozono

    Physical Review B - Condensed Matter and Materials Physics   88 ( 9 )   094521-094525   2013.9

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    DOI: 10.1103/PhysRevB.88.094521

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  • Longitudinal magnetoresistance of Ce(Cu1-xNix)2Si2 Reviewed

    Yoichi Ikeda, Shingo Araki, Tatsuo C. Kobayashi

    Journal of the Korean Physical Society   63 ( 3 )   766 - 767   2013.8

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    DOI: 10.3938/jkps.63.766

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  • Spin-Dependent Molecular Orientation of O-2-O-2 Dimer Formed in the Nanoporous Coordination Polymer Reviewed

    Akihiro Hori, Tatsuo C. Kobayashi, Yoshiki Kubota, Akira Matsuo, Koichi Kindo, Jungeun Kim, Kenichi Kato, Masaki Takata, Hirotoshi Sakamoto, Ryotaro Matsuda, Susumu Kitagawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   82 ( 8 )   084703-1-6   2013.8

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    DOI: 10.7566/JPSJ.82.084703

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  • Pressure effects on rattling and superconductivity in the einstein solids Reviewed

    Yoichi Ikeda, Yasuhiro Kawasaki, Takafumi Shinohara, Shingo Araki, Tatsuo C. Kobayashi, Atsushi Onosaka, Yoshihiko Okamoto, Jun-Ichi Yamaura, Zenji Hiroi

    Journal of the Physical Society of Japan   82 ( 6 )   063707-1-4   2013.6

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    DOI: 10.7566/JPSJ.82.063707

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  • Magneto-absorption in the α phase of solid oxygen at megagauss magnetic fields Reviewed

    T. Nomura, Y. H. Matsuda, J. L. Her, S. Takeyama, A. Matsuo, K. Kindo, T. C. Kobayashi

    Journal of Low Temperature Physics   170 ( 5-6 )   372 - 376   2013.3

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    DOI: 10.1007/s10909-012-0699-z

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  • Indenter Type of Pressure Cell and Its Applications

    KOTEGAWA Hisashi, KOBAYASHI Tatsuo C.

    The Review of High Pressure Science and Technology   22 ( 3 )   214 - 221   2012.8

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    We review an indenter-type pressure cell, which possesses a maximum pressure of 5 GPa and a sample space of φ1.6×1.6 mm. This pressure cell is available not only for transport measurements but also for ac-susceptibility and NMR measurements. An advantage is the small size being able to change the direction of the pressure cell in the conventional superconducting magnet, which makes it possible to measure the anisotropy against magnetic field.<br>

    DOI: 10.4131/jshpreview.22.214

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  • A Study of Ni-Substitution Effects on Heavy-Fermion CeCu2Si2 - Similarities between Ni Substitution and High-Pressure Effects - Reviewed

    Yoichi Ikeda, Shingo Araki, Tatsuo C. Kobayashi, Yusei Shimizu, Tatsuya Yanagisawa, Hiroshi Amitsuka

    81 ( 8 )   083701-1-083701-4   2012.6

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    The effects of Ni substitution on Ce(Cu1-xNix)2Si2 have been studied by
    specific heat and electrical resistivity measurements. The specific heat
    measurement has revealed that the enhanced quantum fluctuations around an
    antiferromagnetic quantum critical point are markedly suppressed by Ni
    substitution, and that the Fermi liquid state recovers in the Nirich region (x
    > 0.12). The characteristic T-linear dependence of the resistivity has been
    observed at approximately x ~ 0.10 together with a sign of superconductivity.
    The variation of n in the form of rho - rho0 = aT^n against Tmax^1, at which
    the resistivity peaks, coincides with the case of high-pressure experiments on
    pure CeCu2Si2. The anomalous T-linear behavior appears to occur in the
    crossover region from the Kondo regime to the valence fluctuation regime rather
    than in the conventional antiferromagnetic quantum critical region.

    DOI: 10.1143/JPSJ.81.083701

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  • Iron-platinum-arsenide superconductors Ca10(PtnAs8)(Fe2−xPtxAs2)5 Reviewed

    Minoru,Nohara, Satomi Kakiya, Kazutaka Kudoa, Yoshihiro Oshiro, Shingo Araki, Tatsuo C. Kobayashi, Kenta Oku, Eiji Nishibori, Hi

    Solid State Communications.   152 ( 8 )   635 - 639   2012.4

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    DOI: 10.1016/j.ssc.2011.12.034

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  • Hall Effect in Single Crystal CeCu2Si2 under High Pressure Reviewed

    S. Araki, Y. Shiroyama, T. Shinohara, Y. Ikeda, T. C. Kobayashi, S. Seiro, C. Geibel, F. Steglich

    Journal of Physics: Conference Series   391   012005   2012

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    DOI: 10.1088/1742-6596/391/1/012005

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  • Cu-NQR of CeCu2Si2 under High Pressure Reviewed

    K. Fujiwara, Y. Okazaki, K. Miyoshi, J. Takeuchi, Y. Ikeda, T. C. Kobayashi, C. Geibel, F. Steglich

    Journal of Physics: Conference Series   391   012012   2012

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    DOI: 10.1088/1742-6596/391/1/012012

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  • Interplay of Superconductivity and Fermi-Liquid Transport in Rh-Doped CaFe2As2 with Lattice-Collapse Transition Reviewed

    Masataka Danura, Kazutaka Kudo, Yoshihiro Oshiro, Shingo Araki, Tatsuo C. Kobayashi, Minoru Nohara

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   80 ( 10 )   103701-1-103701-4   2011.10

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    DOI: 10.1143/JPSJ.80.103701

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  • Pressure-induced structural phase transitions in UIr Reviewed

    H. Kotegawa, S. Araki, T. Akazawa, A. Hori, Y. Irie, S. Fukushima, H. Hidaka, T. C. Kobayashi, K. Takeda, Y. Ohishi, K. Murata, E. Yamamoto, S. Ikeda, Y. Haga, R. Settai, Y. Onuki

    PHYSICAL REVIEW B   84 ( 5 )   054524-1-054524-5   2011.8

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    DOI: 10.1103/PhysRevB.84.054524

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  • Hall effect in CeCu2Si2 under pressure Reviewed

    Shingo Araki, Yuki Shiroyama, Yoichi Ikeda, Tatsuo C. Kobayashi, Silvia Seiro, Christoph Geibel, Frank Steglich

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   80 ( Suppl. A )   SA034-1-SA034-3   2011.7

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    DOI: 10.1143/JPSJS.80SA.SA061

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  • Superconductivity of Heavy Carriers in the Pressure-Induced Phases of Cd2Re2O7 Reviewed

    Tatsuo C. Kobayashi, Yuta Irie, Jun-ichi Yamaura, Zenji Hiroi, Keizo Murata

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   80 ( 2 )   023715   2011.2

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    DOI: 10.1143/JPSJ.80.023715

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  • Incommensurate guest adsorption in bellows-shaped one-dimensional channels of porous coordination polymers Reviewed

    Ryotaro Matsuda, Ryo Kitaura, Yoshiki Kubota, Tatsuo C. Kobayashi, Masaki Takata, Susumu Kitagawa

    MICROPOROUS AND MESOPOROUS MATERIALS   129 ( 3 )   296 - 303   2010.4

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    DOI: 10.1016/j.micromeso.2009.06.023

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  • Magnetic Properties and the Arrangement of Molecular Oxygen Adsorbed in the Microporous Coordination Polymer Cd(bpndc)(bpy) Reviewed

    A. Hori, T. Yamaguchi, T. C. Kobayashi, A. Matsuo, K. Kindo, D. Tanaka, S. Kitagawa

    Journal of Low Temperature Physics   159 ( 1-2 )   122 - 125   2010.4

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    DOI: 10.1007/s10909-009-0084-8

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  • NQR study of pressure induced superconductivity in CeCu2Si2 Reviewed

    K. Fujiware, Y. Okazaki, Y. Hata, K. Miyoshi, J. Takeuchi, T. C. Kobayashi, C. Geibel, F. Steglich

    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   247 ( 3 )   608 - 610   2010.3

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    DOI: 10.1002/pssb.200983050

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  • High-field magnetization process of O<inf>2</inf> adsorbed in a microporous coordination polymer CPL-1 at various temperatures Reviewed

    A. Hori, T. C. Kobayashi, A. Matsuo, K. Kindo, R. Matsuda, S. Kitagawa

    Journal of Physics: Conference Series   200   2010.1

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    High-field magnetization measurements have been performed at various temperatures on the molecular oxygen adsorbed in a microporous coordination polymer CPL-1. Molecular oxygen with S = 1 forms O2-O2 dimer in the nanochannels of CPL-1. The magnetic properties can be explained by not the S = 1 Heisenberg antiferromagnetic dimer model but the O 2-O2 dimer model taking into account the spin-dependent intermolecular potential. This feature is attributed to the fact that the magnetic interaction between O2 is comparable to the van der Waals force. ? 2010 IOP Publishing Ltd.

    DOI: 10.1088/1742-6596/200/2/022018

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  • Pressure and magnetic field tuned quantum critical point in the Kondo antiferromagnet CePtZn Reviewed

    S. K. Dhar, R. Kulkarni, H. Hidaka, Y. Toda, H. Kotegawa, T. C. Kobayashi, P. Manfrinetti, A. Provino

    JOURNAL OF PHYSICS-CONDENSED MATTER   21 ( 15 )   156001   2009.4

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    DOI: 10.1088/0953-8984/21/15/156001

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  • Pressure Effect on Yb-Based Strongly Correlated Electron Systems Reviewed

    T. Mito, M. Otani, M. Nakamura, T. Koyama, S. Wada, H. Kotegawa, T. C. Kobayashi, B. Idzikowski, M. Reiffers, J. L. Sarrao

    ACTA PHYSICA POLONICA A   115 ( 1 )   47 - 52   2009.1

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  • Hindered Rotation of Methane Molecules in the One-Dimensional Nanochannel of a Porous Coordination Polymer Reviewed

    Yoshiki Kubota, Masaki Takata, Ryo Kitaura, Ryotaro Matsuda, Tatsuo C. Kobayashi, Susumu Kitagawa

    JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY   9 ( 1 )   69 - 76   2009.1

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    DOI: 10.1166/jnn.2009.J085

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  • High Pressure NQR Measurement in CeCu2Si2 up to Sudden Disappearance of Superconductivity Reviewed

    Kenji Fujiwara, Yoshiki Hata, Keigo Kobayashi, Kiyotaka Miyoshi, Jun Takeuchi, Yoshiyuki Shimaoka, Hisashi Kotegawai, Tatsuo C. Kobayashi, Christoph Geibel, Frank Steglich

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( 12 )   123711   2008.12

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    DOI: 10.1143/JPSJ.77.123711

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  • Unconventional superconductivity in f-electron systems Reviewed

    Y. Onuki, R. Settai, T. Takeuchi, Y. Haga, E. Yamamoto, N. Tateiwa, M. Nakashima, H. Shishido, T. C. Kobayashi, D. Aoki

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY   53 ( 2 )   1034 - 1040   2008.8

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  • Dependence of pressure-induced phase transitions on pressure-transmitting media in the heavy-electron superconductor URu2Si2 Reviewed

    H. Amitsuka, K. Matsuda, M. Yokoyama, I. Kawasaki, S. Takayama, Y. Ishihara, K. Tenya, N. Tatelwa, T. C. Kobayashi, H. Yoshizawa

    PHYSICA B-CONDENSED MATTER   403 ( 5-9 )   925 - 927   2008.4

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    DOI: 10.1016/j.physb.2007.10.065

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  • Observation of charge fluctuations in skutterudite compounds through an Sb-NQR measurement Reviewed

    H. Kotegawa, Y. Irie, H. Hidaka, T. C. Kobayashi, D. Kikuchi, H. Sugawara, H. Sato

    PHYSICA B-CONDENSED MATTER   403 ( 5-9 )   772 - 774   2008.4

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    DOI: 10.1016/j.physb.2007.10.226

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  • Evolution of transport and low-energy spin fluctuations in YbXCu4(X = Au and Pd) with the application of magnetic field Reviewed

    A. Yamamoto, T. Yokoyama, S. Wada, K. Tabira, H. Kotegawa, T. C. Kobayashi, J. L. Sarrao

    PHYSICA B-CONDENSED MATTER   403 ( 5-9 )   1205 - 1207   2008.4

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    DOI: 10.1016/j.physb.2007.10.325

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  • de Haas-van Alphen study of the Pr-based filled skutterudite PrOs4P12 Reviewed

    Hitoshi Sugawara, Yoshinori Iwahashi, Ko-ichi Magishi, Takahito Saito, Kuniyuki Koyama, Hisatomo Harima, Daisuke Kikuchi, Hideyuki Sato, Toyoaki Endo, Rikio Settai, Yoshichika Onuki, Naoki Wada, Hisashi Kotegawa, Tatsuo C. Kobayashi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( Suppl. A )   108 - 113   2008.1

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    DOI: 10.1143/JPSJS.77SA.108

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  • Anomalous Kondo Effect and Ordered State in Heavy Fermion System SmOs4Sb12 : Resistivity, Sb-NQR, and Magnetization Measurements under High Pressure Reviewed

    Hisashi Kotegawa, Keisuke Tabira, Yuta Irie, Hiroyuki Hidaka, Tatuo C. Kobayashi, Daisuke Kikuchi, Kenya Tanaka, Sho Tatsuoka, Hitoshi Sugawara, Hideyuki Sato

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( Suppl. A )   90 - 95   2008.1

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    DOI: 10.1143/JPSJS.77SA.90

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  • Sb-NQR study of PrOs4Sb12 under high pressure Reviewed

    Shinji Kawasaki, Kouta Katayama, Masahide Nishiyama, Hisashi Kotegawa, Tatsuo C. Kobayashi, Hitoshi Sugawara, Daisuke Kikuchi, Hideyuki Sato, Guo-qing Zheng

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( Suppl. A )   330 - 332   2008.1

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  • Pressure-induced unconventional superconductivity in the heavy-fermion antiferromagnet CeIn3: An 115In-NQR study under pressure Reviewed

    S. Kawasaki, M. Yashima, Y. Kitaoka, K. Takeda, K. Shimizu, Y. Oishi, M. Takata, T. C. Kobayashi, H. Harima, S. Araki, H. Shishido, R. Settai, Y. Onuki

    Phys. Rev. B   77 ( 6 )   064508-1-064508-12   2008

  • Kinetic gate-opening process in a flexible porous coordination polymer Reviewed

    Daisuke Tanaka, Keiji Nakagawa, Masakazu Higuchi, Satoshi Horike, Yoshiki Kubota, Latsuo C. Kobayashi, Masaki Takata, Susumu Kitagawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   47 ( 21 )   3914 - 3918   2008

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    DOI: 10.1002/anie.200705822

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  • Appearance of Pressure-Induced Magnetic Phase in $\alpha$-Manganese Reviewed

    Takeda Keiki, Miyake Atsushi, Shimizu Katsuya, Kobayashi Tatsuo C., Amaya Kiichi

    J Phys Soc Jpn   77 ( 2 )   25001-1-25001-2 - 025001-2   2008

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    DOI: 10.1143/JPSJ.77.025001

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  • Observation of gas molecules adsorbed in the nanochannels of porous coordination polymers by the in situ synchrotron powder diffraction experiment and the MEM/Rietveld charge density analysis Reviewed

    Yoshiki Kubota, Masaki Takata, Tatsuo C. Kobayashi, S. Kitagawa

    COORDINATION CHEMISTRY REVIEWS   251 ( 21-24 )   2510 - 2521   2007.11

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  • Connection between charge fluctuations and the coherent temperature in the heavy-fermion system SmOs4Sb12 :: A Sb-121,Sb-123 NQR study Reviewed

    H. Kotegawa, H. Hidaka, T. C. Kobayashi, D. Kikuchi, H. Sugawara, H. Sato

    PHYSICAL REVIEW LETTERS   99 ( 15 )   156408-1-156408-4   2007.10

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    DOI: 10.1103/PhysRevLett.99.156408

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  • Pressure-temperature phase diagram and superconductivity in UIr Reviewed

    Tatsuo C. Kobayashi, Akihiro Hori, Satoshi Fukushima, Hiroyuki Hidaka, Hisashi Kotegawa, Teruhiko Akazawa, Keiki Takeda, Yasuo Ohishi, Etsuji Yamamoto

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   76 ( 5 )   51007-1 -51007-11   2007.5

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    DOI: 10.1143/JPSJ.76.051007

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  • Pressure-temperature phase diagrams of some heavy fermion systems Reviewed

    T. C. Kobayashi, H. Hidaka, T. Fujiwara, M. Tanaka, K. Takeda, T. Akazawa, K. Shimizu, S. Kirita, R. Asai, H. Nakawaki, M. Nakashima, R. Settai, E. Yamamoto, Y. Haga, Y. Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   19 ( 12 )   125205-1-125205-9   2007.3

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    DOI: 10.1088/0953-8984/19/12/125205

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  • Drastic change of the electronic states at the quantum critical point in heavy fermions Reviewed

    R. Settai, H. Shishido, T. Kubo, S. Araki, T. C. Kobayashi, H. Harima, Y. Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   310 ( 2 )   541 - 547   2007.3

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    DOI: 10.1016/j.jmmm.2006.11.197

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  • Ge-73-NQR study of heavy-fermion compound CeNi2Ge2 Reviewed

    S. Kawasaki, T. Sada, T. Miyoshi, H. Kotegawa, H. Mukuda, Y. Kitaoka, T. C. Kobayashi, T. Fukuhara, K. Maezawa, K. M. Itoh, E. E. Haller

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   310 ( 2 )   590 - 592   2007.3

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    DOI: 10.1016/j.jmmm.2006.10.232

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  • High-quality single crystal growth and physical properties in a ferromagnet UIr Reviewed

    E. Yamamoto, Y. Haga, S. Ikeda, T. D. Matsuda, T. Akazawa, H. Kotegawa, T. C. Kobayashi, Y. Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   310 ( 2 )   E123 - E125   2007.3

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    DOI: 10.1016/j.jmmm.2006.10.292

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  • Effect of uniaxial stress on pressure-induced metal-insulator transition in PrFe4P12 Reviewed

    Hiroyuki Hidaka, Naoki Wada, Hisashi Kotegawa, Tatsuo C. Kobayashi, Daisuke Kikuchi, Hideyuki Sato, Hitoshi Sugawara

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   310 ( 2 )   E228 - E230   2007.3

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    DOI: 10.1016/j.jmmm.2006.10.1074

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  • Nonmagnetic indenter-type high-pressure cell for magnetic measurements Reviewed

    T. C. Kobayashi, H. Hidaka, H. Kotegawa, K. Fujiwara, M. I. Eremets

    REVIEW OF SCIENTIFIC INSTRUMENTS   78 ( 2 )   23909-1-23909-5   2007.2

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    DOI: 10.1063/1.2459512

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  • Transport and magnetic properties of pressure-induced insulating phase in PrFe4P12 Reviewed

    Hiroyuki Hidaka, Hisashi Kotegawa, Satoshi Fukushima, Naoki Wada, Tatsuo C. Kobayashi, Hisatomo Harima, Kenji Fujiwara, Daisuke Kikuchi, Hideyuki Sato, Hitoshi Sugawara

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 9 )   2006.9

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  • Pressure-induced superconductivity in CeNiGe3 Reviewed

    H Kotegawa, T Miyoshi, K Takeda, S Fukushima, H Hidaka, K Tabata, TC Kobayashi, M Nakashima, A Thamizhavel, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   378-80   419 - 420   2006.5

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    DOI: 10.1016/j.phys.2006.01.147

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  • Pressure-induced superconductivity in ferromagnet UIr without inversion symmetry Reviewed

    TC Kobayashi, S Fukushima, H Hidaka, H Kotegawa, T Akazawa, E Yamamoto, Y Haga, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   378-80   355 - 358   2006.5

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    DOI: 10.1016/j.physb.2006.01.26

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  • Anisotropic behavior in resistivity of RAgSb2 (R = Ce, La) Reviewed

    Y Watanabe, Y Inada, H Hidaka, H Kotegawa, TC Kobayashi, TD Matsuda, D Aoki

    PHYSICA B-CONDENSED MATTER   378-80   827 - 828   2006.5

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    DOI: 10.1016/j.physb.2006.01.305

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  • Evidence for unconventional superconducting fluctuations in heavy-fermion compound CeNi2Ge2 Reviewed

    S Kawasaki, T Sada, T Miyoshi, H Kotegawa, H Mukuda, TC Kobayashi, T Fukuhara, K Maezawa, KM Itoh, EE Haller

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 4 )   2006.4

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    DOI: 10.1143/JPSJ.75.043702

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  • Electronic states in a semimetal Ce3Sn7 Reviewed

    Y Okuda, MT Suzuki, H Harima, M Nakashima, S Kirita, TC Kobayashi, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 4 )   2006.4

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    DOI: 10.1143/JPSJ.75.044715

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  • Tomonaga-Luttinger liquid in a quasi-one-dimensional S=1 antiferromagnet observed by specific heat measurements Reviewed

    M Hagiwara, H Tsujii, CR Rotundu, B Andraka, Y Takano, N Tateiwa, TC Kobayashi, T Suzuki, S Suga

    PHYSICAL REVIEW LETTERS   96 ( 14 )   2006.4

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    DOI: 10.1103/PhysRevLett.96.147203

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  • Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe3 Reviewed

    H Kotegawa, K Takeda, T Miyoshi, S Fukushima, H Hidaka, TC Kobayashi, T Akazawa, Y Ohishi, M Nakashima, A Thamizhavel, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 4 )   044713-1-6   2006.4

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    DOI: 10.1143/JPSJ.75.044713

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  • Anisotropic residual resistivity under high pressure in UIr Reviewed

    Akihiro Hori, Hiroyuki Hidaka, Hisashi Kotegawa, Tatsuo C. Kobayashi, Teruhiko Akazawa, Syugo Ikeda, Etsuji Yamamoto, Yoshinori Haga, Rikio Settai, Yoshichika Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75   82 - 84   2006.1

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  • Metastable sorption state of a metal-organic porous material determined by in situ synchrotron powder diffraction Reviewed

    Yoshiki Kubota, Masaki Takata, Ryotaro Matsuda, Ryo Kitaura, Susumu Kitagawa, Tatsuo C. Kobayashi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   45 ( 30 )   4932 - 4936   2006

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    DOI: 10.1002/anie.200600976

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  • Formation and characterization of crystalline molecular arrays of gas molecules in a 1-dimensional ultramicropore of a porous copper coordination polymer Reviewed

    R Kitaura, R Matsuda, Y Kubota, S Kitagawa, M Takata, TC Kobayashi, M Suzuki

    JOURNAL OF PHYSICAL CHEMISTRY B   109 ( 49 )   23378 - 23385   2005.12

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    DOI: 10.1021/jp054411j

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  • Change of the Fermi surface across the critical pressure in CeIn3: The de Haas-van Alphen study under pressure Reviewed

    R Settai, T Kubo, T Shiromoto, D Honda, H Shishido, K Sugiyama, Y Haga, TD Matsuda, K Betsuyaku, H Harima, TC Kobayashi, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   74 ( 11 )   3016 - 3026   2005.11

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    DOI: 10.1143/JPSJ.74.3016

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  • Single crystal growth and fermi surface properties of an antiferromagnet UPdGa5 Reviewed

    S Ikeda, TD Matsuda, Y Haga, E Yamamoto, M Nakashima, S Kirita, TC Kobayashi, M Hedo, Y Uwatoko, H Yamagami, H Shishido, T Ueda, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   74 ( 8 )   2277 - 2281   2005.8

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    DOI: 10.1143/JPSJ.74.2277

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  • Heavy fermion compound SmOs4Sb12 in vicinity of ferromagnetic critical point Reviewed

    H Kotegawa, H Hidaka, Y Shimaoka, T Miki, TC Kobayashi, D Kikuchi, H Sugawara, H Sato

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   74 ( 8 )   2173 - 2176   2005.8

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    DOI: 10.1143/JPSJ.74.2173

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  • Highly controlled acetylene accommodation in a metal-organic microporous material Reviewed

    R Matsuda, R Kitaura, S Kitagawa, Y Kubota, RV Belosludov, TC Kobayashi, H Sakamoto, T Chiba, M Takata, Y Kawazoe, Y Mita

    NATURE   436 ( 7048 )   238 - 241   2005.7

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    DOI: 10.1038/nature03852

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  • De Haas-van Alphen effect in CeIn3 under pressure Reviewed

    Rikio Settai, Tetsuo Kubo, Hiroaki Shishido, Tatsuo C. Kobayashi, Yoshichika Onuki

    Physica B: Condensed Matter   359-361   317 - 319   2005.4

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    DOI: 10.1016/j.physb.2005.01.119

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  • Magnetization study of heavy Fermion superconductor URu2Si2 under high pressures Reviewed

    K Tenya, Kawasaki, I, K Tameyasu, S Yasuda, M Yokoyama, H Amitsuka, N Tateiwa, TC Kobayashi

    PHYSICA B-CONDENSED MATTER   359   1135 - 1137   2005.4

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    DOI: 10.1016/j.physb.2005.01.325

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  • Metal-insulator transition under high pressure in PrFe4P12 Reviewed

    H Hidaka, Ando, I, H Kotegawa, TC Kobayashi, H Harima, M Kobayashi, H Sugawara, H Sato

    PHYSICA B-CONDENSED MATTER   359   886 - 888   2005.4

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    DOI: 10.1016/j.physb.2005.01.334

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  • High-pressure effect on the electrical resistivity in CeNiGe3 and CeNi2Al5 Reviewed

    M Nakashima, K Tabata, A Thamizhavel, TC Kobayashi, M Hedo, Y Uwatoko, K Shimizu, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   359   266 - 268   2005.4

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    DOI: 10.1016/i.physb.2005.01.066

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  • Pressure-induced charge ordering of LiV2O4 Reviewed

    K Takeda, H Hidaka, H Kotegawa, TC Kobayashi, K Shimizu, H Harima, K Fujiwara, K Miyoshi, J Takeuchi, Y Ohishi, T Adachi, M Takata, E Nishibori, M Sakata, T Watanuki, O Shimomura

    PHYSICA B-CONDENSED MATTER   359   1312 - 1314   2005.4

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    DOI: 10.1016/j.physb.2005.01.390

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  • Pressure-induced superconductivity in UIr without inversion symmetry Reviewed

    T Akazawa, H Hidaka, H Kotegawa, TC Kobayashi, T Fujiwara, E Yamamoto, Y Haga, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   359   1138 - 1140   2005.4

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    DOI: 10.1016/j.physb.2005.01.335

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  • Pressure-induced metal-insulator transition in the filled skutterudite PrFe4P12 Reviewed

    H Hidaka, Ando, I, H Kotegawa, TC Kobayashi, H Harima, M Kobayashi, H Sugawara, H Sato

    PHYSICAL REVIEW B   71 ( 7 )   2005.2

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    DOI: 10.1103/PhysRevB.71.073102

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  • Pressure-induced metal-insulator transition in the filled skutterudite PrFe <inf>4</inf>P <inf>12</inf> Reviewed

    Hiroyuki Hidaka, Ikuma Ando, Hisashi Kotegawa, Tatsuo C. Kobayashi, Hisatomo Harima, Miki Kobayashi, Hitoshi Sugawara, Hideyuki Sato

    Physical Review B - Condensed Matter and Materials Physics   71 ( 7 )   2005.2

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    DOI: 10.1103/PhysRevB.71.073102

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  • Direct observation of hydrogen molecules adsorbed in a microporous coordination polymer Reviewed

    Y. Kubota, M. Takata, R. Matsuda, R. Kitaura, S. Kitagawa, K. Kato, M. Sakata, T. C. Kobayashi

    Angew. Chem. Int. Ed.   2005

  • Magnetic properties of molecular oxygen adsorbed in micro-porous metal-organic solids Reviewed

    TC Kobayashi, A Matsuo, M Suzuki, K Kindo, R Kitaura, R Matsuda, S Kitagawa

    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT   ( 159 )   271 - 279   2005

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    DOI: 10.1143/PTPS.159.271

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  • Guest shape-responsive fitting of porous coordination polymer with shrinkable framework Reviewed

    R Matsuda, R Kitaura, S Kitagawa, Y Kubota, TC Kobayashi, S Horike, M Takata

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   126 ( 43 )   14063 - 14070   2004.11

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    DOI: 10.1021/ja046925m

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  • Pressure-induced superconductivity in UIr Reviewed

    T Akazawa, H Hidaka, H Kotegawa, TC Kobayashi, T Fujiwara, E Yamamoto, Y Haga, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   73 ( 11 )   3129 - 3134   2004.11

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    DOI: 10.1143/JPSJ.73.3129

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  • Magnetization and Magnetoresistance measurements up to 60 T at 70 mK Reviewed

    Y. Narumi, N. Takamoto, K. Kindo, T. C. Kobayashi, N. Shimizu, F. Iga, S. Hiura, T. Takabatake, M. Vendaguer

    2004.11

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    DOI: 10.1142/9789812702517_0051

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  • Rational design and crystal structure determination of a 3-D metal-organic jungle-gym-like open framework Reviewed

    R Kitaura, F Iwahori, R Matsuda, S Kitagawa, Y Kubota, M Takata, TC Kobayashi

    INORGANIC CHEMISTRY   43 ( 21 )   6522 - 6524   2004.10

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    DOI: 10.1021/ic049005d

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  • Heat-capacity anomalies at T-sc and T-* in the ferromagnetic superconductor UGe2 Reviewed

    N Tateiwa, TC Kobayashi, K Amaya, Y Haga, R Settai, Y Onuki

    PHYSICAL REVIEW B   69 ( 18 )   2004.5

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    DOI: 10.1103/PhysRevB.69.180513

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  • Heat-capacity anomalies at Tsc and T* in the ferromagnetic superconductor UGe2 Reviewed

    N. Tateiwa, T. C. Kobayashi, K. Amaya, Y. Haga, R. Settai, Y. Onuki

    Physical Review B - Condensed Matter and Materials Physics   69 ( 18 )   1 - 180513   2004.5

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    DOI: 10.1103/PhysRevB.69.180513

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  • Evidence for the pressure induced magnetic ordering in YbInCu4 Reviewed

    Takeshi Mito, Takehide Koyama, Shinji Wada, Takaki Muramatsu, Tatsuo C. Kobayashi, John L. Sarrao

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   E47 - E48   2004.5

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    DOI: 10.1016/j.jmmm.2003.11.146

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  • A change of the Fermi surface in CeIn3 under pressure Reviewed

    R Settai, T Kubo, H Shishido, TC Kobayashi, Y Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   223 - 224   2004.5

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    DOI: 10.1016/j.jmmm.2003.11.200

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  • Magnetism of uranium dioxide UO2 under high pressure Reviewed

    H. Sakai, H. Kato, Y. Tokunaga, S. Kambe, R. E. Walstedt, A. Nakamura, N. Tateiwa, C. Kobayashi

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   E413 - E414   2004.5

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    DOI: 10.1016/j.jmmm.2003.11.307

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  • Magnetism of a one-dimensional array of oxygen in a micro-porous metal-organic solid Reviewed

    A. Matsuo, T. C. Kobayashi, M. Suzuki, K. Kindo, R. Kitaura, R. Matsuda, H. -C. Chang, S. Kitagawa

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   E643 - E645   2004.5

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    DOI: 10.1016/j.jmmm.2003.11.327

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  • Recent advances in the magnetism and superconductivity of heavy fermion systems Reviewed

    Y Onuki, R Settai, K Sugiyama, T Takeuchi, TC Kobayashi, Y Haga, E Yamamoto

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   73 ( 4 )   769 - 787   2004.4

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  • Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagome lattice Reviewed

    Y Narumi, K Katsumata, Z Honda, JC Domenge, P Sindzingre, C Lhuillier, Y Shimaoka, TC Kobayashi, K Kindo

    EUROPHYSICS LETTERS   65 ( 5 )   705 - 711   2004.3

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    DOI: 10.1209/epl/i2003-10164-5

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  • LiNMR in LiV2O4 under high pressure Reviewed

    K Fujiwara, K Miyoshi, J Takeuchi, Y Shimaoka, T Kobayashi

    JOURNAL OF PHYSICS-CONDENSED MATTER   16 ( 11 )   S615 - S619   2004.3

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    DOI: 10.1088/0953-8984/16/11/007

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  • Electrical, Thermal and Magnetic Properties of CeNiIn4 Reviewed

    Hiroaki Shishido, Noriko Nakamura, Taiki Ueda, Rihito Asai, Andrei Galatanu, Etsuji Yamamoto, Yoshinori Haga, Tetsuya Takeuchi, Yasuo Narumi, Tatsuo C Kobayashi, Koichi Kindo, Kiyohiro Sugiyama, Takahiro Namiki, Yuji Aoki, Hideyuki Sato, Yoshichika Ōnuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   73 ( 3 )   664 - 668   2004.3

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    DOI: 10.1143/JPSJ.73.664

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  • Pressure-induced superconductivity in ferromagnetic UIr without inversion symmetry Reviewed

    T Akazawa, H Hidaka, T Fujiwara, TC Kobayashi, E Yamamoto, Y Haga, R Settai, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   16 ( 4 )   L29 - L32   2004.2

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  • Dissimilarity between metallic-like transport in the dielectric spin density wave and field-induced spin density wave states in (TMTSF) <inf>2</inf>PF<inf>6</inf> Reviewed

    A. V. Kornilov, V. M. Pudalov, Y. Kitaoka, K. Ishida, T. Mito, N. Tateiwa, T. C. Kobayashi, J. S. Qualls

    JETP Letters   80 ( 11 )   707 - 710   2004

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    DOI: 10.1134/1.1862799

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  • High-pressure effect on the electronic state in CeNiGe<inf>3</inf>: Pressure-induced superconductivity Reviewed

    M. Nakashima, K. Tabata, A. Thamizhavel, T. C. Kobayashi, M. Hedo, Y. Uwatoko, K. Shimizu, R. Settai, Y. Onuki

    Journal of Physics Condensed Matter   16 ( 20 )   2004

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    DOI: 10.1088/0953-8984/16/20/L01

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  • Low temperature magnetic properties of CeTBi2 (T : Ni, Cu and Ag) single crystals Reviewed

    A Thamizhavel, A Galatanu, E Yamamoto, T Okubo, M Yamada, K Tabata, TC Kobayashi, N Nakamura, K Sugiyama, K Kindo, T Takeuchi, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   72 ( 10 )   2632 - 2639   2003.10

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    DOI: 10.1143/JPSJ.72.2632

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  • Magnetic properties and a change of the electrical resistivity under pressure in CePtGe2 Reviewed

    S Kirita, A Thamizhavel, T Takeuchi, K Tabata, TC Kobayashi, A Galatanu, E Yamamoto, R Settai, S Ramakrishnan, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   72 ( 9 )   2338 - 2343   2003.9

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    DOI: 10.1143/JPSJ.72.2338

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  • Pressure-induced weak ferromagnetism in uranium dioxide, UO2 Reviewed

    H Sakai, H Kato, Y Tokunaga, S Kambe, RE Walstedt, A Nakamura, N Tateiwa, TC Kobayashi

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2035 - S2037   2003.7

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    DOI: 10.1088/0953-8984/15/28/321

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  • An anomalously huge resistivity peak under pressure in CeRhGe Reviewed

    R Asai, A Thamizhavel, H Shishido, T Ueda, Y Inada, R Settai, C Kobayashi, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 29 )   L463 - L468   2003.7

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  • Magnetic properties of a S = 1/2 zigzag spin chain compound (N2H5)CuCl3 Reviewed

    N Maeshima, M Hagiwara, Y Narumi, K Kindo, TC Kobayashi, K Okunishi

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 21 )   3607 - 3618   2003.6

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    DOI: 10.1088/0953-8984/15/21/309

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  • De Haas-Van Alphen experiments under extreme conditions of low temperature, high field and high pressure, for high-quality cerium and uranium compounds Reviewed

    R Settai, S Araki, H Shishido, Y Inada, Y Haga, E Yamamoto, TC Kobayashi, N Tateiwa, Y Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   262 ( 3 )   399 - 406   2003.6

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    DOI: 10.1016/S0304-8853(03)00070-2

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  • Magnetic ordering in the pressure-stabilized high-temperature phase of YbInCu4 Reviewed

    T Mito, T Koyama, M Shimoide, S Wada, T Muramatsu, TC Kobayashi, JL Sarrao

    PHYSICAL REVIEW B   67 ( 22 )   2003.6

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    DOI: 10.1103/PhysRevB.67.224409

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  • A heat capacity anomaly of the superconducting transition in a ferromagnetic superconductor UGe2 Reviewed

    N Tateiwa, TC Kobayashi, K Amaya, Y Haga, R Settai, Y Onuki

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   388   527 - 528   2003.5

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    DOI: 10.1016/S0921-4534(02)02650-3

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  • Specific heat of an S=1 quasi-1D bond alternating antiferromagnet in a magnetic field Reviewed

    N Tateiwa, M Hagiwara, H Aruga-Katori, TC Kobayashi

    PHYSICA B-CONDENSED MATTER   329   1209 - 1210   2003.5

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    DOI: 10.1016/S0921-4526(02)02130-0

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  • A heat capacity anomaly at T* in a ferromagnetic superconductor UGe2 Reviewed

    N Tateiwa, TC Kobayashi, K Amaya, Y Haga, R Settai, Y Onuki

    ACTA PHYSICA POLONICA B   34 ( 2 )   515 - 518   2003.2

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  • De Haas-van Alphen experiments in the quantum critical region of cerium and uranium compounds Reviewed

    Y Onuki, R Settai, S Araki, M Nakashima, H Ohkuni, H Shishido, A Thamizhavel, Y Inada, Y Haga, E Yamamoto, TC Kobayashi

    ACTA PHYSICA POLONICA B   34 ( 2 )   667 - 678   2003.2

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  • Huge residual resistivity in the quantum critical region of CeAgSb2 Reviewed

    M Nakashima, S Kirita, R Asai, TC Kobayashi, T Okubo, M Yamada, A Thamizhavel, Y Inada, R Settai, A Galatanu, E Yamamoto, T Ebihara, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 4 )   L111 - L117   2003.2

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    DOI: 10.1088/0953-8984/15/4/101

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  • Electrical resistivity of CeTIn5 (T=Rh, Ir) under high pressure Reviewed

    T. Muramatsu, T. C. Kobayashi, K. Shimizu, K. Amaya, D. Aoki, Y. Haga, Y. Onuki

    Physica C   2003

  • Evolution of pressure-induced heavy fermion state and superconductivity in CeRhIn5: A high-pressure fermi surface study Reviewed

    H. Shishido, R. Settai, S. Araki, T. Ueda, Y. Inada, T. C. Kobayashi, T. Muramatsu, Y. Haga, Y. Onuki

    Physical Review B - Condensed Matter and Materials Physics   66 ( 21 )   2145101 - 2145105   2002.12

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  • Evolution of pressure-induced heavy fermion state and superconductivity in CeRhIn5: A high-pressure Fermi surface study Reviewed

    H Shishido, R Settai, S Araki, T Ueda, Y Inada, TC Kobayashi, T Muramatsu, Y Haga, Y Onuki

    PHYSICAL REVIEW B   66 ( 21 )   2002.12

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    DOI: 10.1103/PhysRevB.66.214510

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  • Formation of a one-dimensional array of oxygen in a microporous metal-organic solid Reviewed

    R Kitaura, S Kitagawa, Y Kubota, TC Kobayashi, K Kindo, Y Mita, A Matsuo, M Kobayashi, HC Chang, TC Ozawa, M Suzuki, M Sakata, M Takata

    SCIENCE   298 ( 5602 )   2358 - 2361   2002.12

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    DOI: 10.1126/science.1078481

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  • Pressure-induced superconductivity in a ferromagnet, UGe2: resistivity measurements in a magnetic field Reviewed

    TC Kobayashi, K Hanazono, N Tateiwa, K Amaya, Y Haga, R Settai, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 44 )   10779 - 10782   2002.11

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    DOI: 10.1088/0953-8984/13/1/103

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  • Heavy fermions in cerium and uranium compounds studied by the de Haas-van Alphen experiment Reviewed

    S Araki, R Settai, M Nakashima, H Shishido, S Ikeda, H Nakawaki, Y Haga, N Tateiwa, TC Kobayashi, H Harima, H Yamagami, Y Aoki, T Namiki, H Sato, Y Onuki

    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS   63 ( 6-8 )   1133 - 1139   2002.6

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    DOI: 10.1016/S0022-3697(02)00156-7

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  • Pressure-induced superconductivity in an antiferromagnet CeRh2Si2 Reviewed

    S Araki, M Nakashima, R Settai, TC Kobayashi, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 21 )   L377 - L383   2002.6

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  • Pressure study of an antiferromagnet, CeMg2Cu9 Reviewed

    H Nakawaki, Y Inada, R Asai, M Yamada, T Okubo, S Ikeda, A Thamizhavel, TC Kobayashi, R Settai, E Yamamoto, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 14 )   L305 - L311   2002.4

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  • Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe2 Reviewed

    N Tateiwa, TC Kobayashi, K Amaya, Y Haga, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   312   109 - 111   2002.3

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  • Spin dynamics of heavy fermion system LiV2O4 under high pressure Reviewed

    K Fujiwara, H Yoshioka, K Miyoshi, J Takeuchi, TC Kobayashi, K Amaya

    PHYSICA B-CONDENSED MATTER   312   913 - 915   2002.3

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    DOI: 10.1016/S0921-4526(01)01492-2

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  • Transport properties of CeRhIn5 under high pressures up to 8.5 GPa Reviewed

    T Muramatsu, N Tateiwa, TC Kobayashi, K Shimizu, K Amaya, D Aoki, H Shishido, Y Haga, Y Onuki

    PHYSICA B-CONDENSED MATTER   312   140 - 141   2002.3

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    DOI: 10.1016/S0921-4526(01)01091-2

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  • A change of the Fermi surface across the metamagnetic transition under pressure in UGe2 Reviewed

    Y Haga, M Nakashima, R Settai, S Ikeda, T Okubo, S Araki, TC Kobayashi, N Tateiwa, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 5 )   L125 - L135   2002.2

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  • Novel phases in the field-induced spin-density-wave state in (TMTSF)(2)PF6 Reviewed

    AV Kornilov, VM Pudalov, Y Kitaoka, K Ishida, T Mito, JS Brooks, JS Qualls, JAAJ Perenboom, N Tateiwa, TC Kobayashi

    PHYSICAL REVIEW B   65 ( 6 )   2002.2

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    DOI: 10.1103/PhysRevB.65.060404

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  • A change of the Fermi surface in UGe2 across the critical pressure Reviewed

    R Settai, M Nakashima, S Araki, Y Haga, TC Kobayashi, N Tateiwa, H Yamagami, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 1 )   L29 - L36   2002.1

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  • Fermi surface, magnetic and superconducting properties of LaRhIn5 and CeTIn5 (T : Co, Rh and Ir) Reviewed

    H Shishido, R Settai, D Aoki, S Ikeda, H Nakawaki, N Nakamura, T Iizuka, Y Inada, K Sugiyama, T Takeuchi, K Kindo, TC Kobayashi, Y Haga, H Harima, Y Aoki, T Namiki, H Sato, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   71 ( 1 )   162 - 173   2002.1

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    DOI: 10.1143/JPSJ.71.162

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  • Pressure-temperature phase diagram of antiferromagnetism and superconductivity in CeRhIn5 and CeIn3: In-115-NQR study under pressure Reviewed

    S Kawasaki, T Mito, GQ Zheng, C Thessieu, Y Kawasaki, K Ishida, Y Kitaoka, T Muramatsu, TC Kobayashi, D Aoki, S Araki, Y Haga, R Settai, Y Onuki

    PHYSICAL REVIEW B   65 ( 2 )   020504-1 - 4   2002.1

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    DOI: 10.1103/PhysRevB.65.020504

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  • Thermal Property of Heavy Fermion Compound YbP Reviewed

    N. Tateiwa, T. Kobayashi, K. Amaya, D. X. Li, Y. Shiokawa, T. Suzuki

    J. Phys. Soc. Jpn.   71 ( 5 )   1365 - 1369   2002

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    Low-temperature specific heat and its field-dependence up to 16 T was measured in a stoichiometric single crystal of YbP. A sharp peak was observed at $T_{\text{N } } = 0.53$ K in zero magnetic field. Application of external field seems to induce a new magnetic phase above 11 T. The field dependence of the transition temperature in the high-field phase is different from that of the low field phase. The linear coefficient of the electronic specific heat is estimated as 120 mJ/mol$\cdot$K2 from low temperature specfic heat, suggesting heavy Fermion state in YbP.

    DOI: 10.1143/JPSJ.71.1365

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  • Evolution of pressure-induced heavy fermion state and superconductivity in (formula presented) A high-pressure Fermi surface study Reviewed

    H. Shishido, R. Settai, S. Araki, T. Ueda, Y. Inada, T. C. Kobayashi, T. Muramatsu, Y. Haga, Y. Ōnuki

    Physical Review B - Condensed Matter and Materials Physics   66 ( 21 )   1 - 5   2002

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    DOI: 10.1103/PhysRevB.66.214510

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  • Thermal properties of a low carrier concentration compound YbP Reviewed

    N. Tateiwa, T. C. Kobayashi, K. Amaya, D. Li, Y. Shiokawa, T. Suzuki

    J. Phys. Soc. Jpn.   2002

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  • Magnetic - nonmagnetic transition of U3P4 at high pressures Reviewed

    Keiki Takeda, Masashi Tanaka, Tatsuo C. Kobayashi, Teruhiko Akazawa, Katsuya Shimizu, Kiichi Amaya, Yoshihiko Inada, Piotr Wiśniewski, Dai Aoki, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Ōnuki

    Journal of Nuclear Science and Technology   39   191 - 194   2002

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    DOI: 10.1080/00223131.2002.10875441

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  • Slow magnetization reversal in [Ni-4(OMe)(4)(sal(4)(MeOH)(4)] Reviewed

    M Nakano, GE Matsubayashi, T Muramatsu, TC Kobayashi, K Amaya, J Yoo, G Christou, DN Hendrickson

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS   376   405 - 410   2002

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  • Thermal properties of a ferromagnetic superconductor UGe2 Reviewed

    Naoyuki Tateiwa, Tatsuo C. Kobayashi, Kichi Amaya, Yoshinori Haga, Rikio Settai, Yoshichika Onuki

    Journal of Nuclear Science and Technology   39   195 - 198   2002

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    DOI: 10.1080/00223131.2002.10875442

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  • Pressure-temperature phase diagram of antiferromagnetism and superconductivity in CeRhIn5 and CeIn3: 115In−NQR study under pressure Reviewed

    S. Kawasaki, T. Mito, G.-q. Zheng, C. Thessieu, Y. Kawasaki, K. Ishida, Y. Kitaoka, T. Muramatsu, T. C. Kobayashi, D. Aoki, S. Araki, Y. Haga, R. Settai, Y. Ōnuki

    Physical Review B   65 ( 2 )   2001.12

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    DOI: 10.1103/physrevb.65.020504

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  • Fermi surface instability in CeRh2Si2 under pressure Reviewed

    S. Araki, R. Settai, T. C. Kobayashi, H. Harima, Y. Onuki

    Physical Review B - Condensed Matter and Materials Physics   64 ( 22 )   2244171 - 2244177   2001.12

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  • Fermi surface instability in CeRh2Si2 under pressure Reviewed

    S Araki, R Settai, TC Kobayashi, H Harima, Y Onuki

    PHYSICAL REVIEW B   64 ( 22 )   2001.12

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    DOI: 10.1103/PhysRevB.64.224417

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  • Superconductivity of CeRhIn5 under high pressure Reviewed

    T Muramatsu, N Tateiwa, TC Kobayashi, K Shimizu, K Amaya, D Aoki, H Shishido, Y Haga, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 11 )   3362 - 3367   2001.11

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    DOI: 10.1143/JPSJ.70.3362

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  • Magnetic properties of a pressure-induced superconductor UGe2 Reviewed

    N Tateiwa, K Hanazono, TC Kobayashi, K Amaya, T Inoue, K Kindo, Y Koike, N Metoki, Y Haga, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 10 )   2876 - 2879   2001.10

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    DOI: 10.1143/JPSJ.70.2876

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  • Pressure-induced superconductivity in a ferromagnet UGe2 (vol 13, pg L17, 2001) Reviewed

    N Tateiwa, TC Kobayashi, K Hanazono, K Amaya, Y Haga, R Settai, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   13 ( 29 )   6443 - 6443   2001.7

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  • Neutron scattering study of linear-chain Haldane compounds NDMAZ and NDMAP Reviewed

    N Metoki, Y Koike, Y Matsuoka, T Kobayashi, M Yamashita

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   226   414 - 416   2001.5

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  • Proton NMR study of the field-induced long-range ordering in Haldane gap system NDMAP Reviewed

    TC Kobayashi, K Tanaka, K Fujiwara, K Amaya, N Aizawa, T Ishii, M Yamashita

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   226   423 - 424   2001.5

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  • Field-induced long-range ordering in Haldane gap system NDMAZ Reviewed

    TC Kobayashi, H Tatewaki, A Koda, K Amaya, Y Narumi, K Kindo, N Aizawa, T Ishii, M Yamashita

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 3 )   813 - 817   2001.3

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    DOI: 10.1143/JPSJ.70.813

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  • High-field magnetization of URu2Si2 under high pressure Reviewed

    T Inoue, K Kindo, H Okuni, K Sugiyama, Y Haga, E Yamamoto, TC Kobayashi, Y Uwatoko, Y Onuki

    PHYSICA B   294   271 - 275   2001.1

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    DOI: 10.1016/S0921-4526(00)00657-8

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  • Pressure-induced superconductivity in a ferromagnet UGe2 Reviewed

    N Tateiwa, TC Kobayashi, K Hanazono, K Amaya, Y Haga, R Settai, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   13 ( 1 )   L17 - L23   2001.1

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    DOI: 10.1088/0953-8984/13/1/103

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  • High-quality single-crystal growth and a change of the electronic states under pressure in CeRh2Si2 Reviewed

    S. Araki, R. Settai, T. C. Kobayashi, Y. Onuki

    Journal of Magnetism and Magnetic Materials   226-230 ( I )   80 - 82   2001

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    DOI: 10.1016/S0304-8853(00)00785-X

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  • Neutron scattering studies in the linear-chain Haldane materials, NDMAZ and NDMAP Reviewed

    Y Koike, N Metoki, Y Morii, T Kobayashi, T Ishii, M Yamashita

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 12 )   4034 - 4042   2000.12

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  • Specific heat and effect of pressure on the electrical resistivity of CePtGa single crystal Reviewed

    Y Uwatoko, M Kosaka, M Shirakawa, G Oomi, N Mori, T Kobayashi, H Tatewaki, K Shimizu, K Amaya

    PHYSICA B   284   1321 - 1322   2000.7

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  • Pressure dependence of quadrupole ordering temperature T-Q in CeB6 Reviewed

    TC Kobayashi, K Hashimoto, S Eda, K Shimizu, K Amaya, Y Onuki

    PHYSICA B   281   553 - 554   2000.6

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    DOI: 10.1016/S0921-4526(99)00947-3

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  • Metamagnetic transition of CeRh2Si2 under high fields and high pressures at various temperatures Reviewed

    T Hamamoto, K Kindo, TC Kobayashi, Y Uwatoko, S Araki, R Settai, Y Onuki

    PHYSICA B   281   64 - 65   2000.6

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  • Pressure-dependence of superconducting behavior in CeRh2Si2 Reviewed

    TC Kobayashi, T Muramatsu, M Takimoto, K Hanazono, K Shimizu, K Amaya, S Araki, R Settai, Y Onuki

    PHYSICA B   281   7 - 8   2000.6

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  • Electrical studies in DAC Reviewed

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 5 )   218 - 222   2000

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  • Electrical resistance measurement in hydrostatic pressure up to lO GPa using a diamond anvil cell Reviewed

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 5 )   223 - 226   2000

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  • Two gaps in (VO)(2)P2O7: Observation using high-field magnetization and NMR Reviewed

    T Yamauchi, Y Narumi, J Kikuchi, Y Ueda, K Tatani, TC Kobayashi, K Kindo, K Motoya

    PHYSICAL REVIEW LETTERS   83 ( 18 )   3729 - 3732   1999.11

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    DOI: 10.1103/PhysRevLett.83.3729

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  • Field-induced 3D-LRO of Haldane-gap antiferromagnet NDMAZ Reviewed

    A Koda, TC Kobayashi, K Amaya, H Yamashita

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   196   443 - 445   1999.5

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    DOI: 10.1016/S0304-8853(98)00804-X

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  • Magnetic and transport properties of CeRh2Si2 under high pressures Reviewed

    T Muramatsu, S Eda, TC Kobayashi, MI Eremets, K Amaya, S Araki, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   259-61   61 - 62   1999.1

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    DOI: 10.1016/S0921-4526(98)00909-0

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  • Metallization and superconductivity in CsI at pressures up to 220 GPa Reviewed

    M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya

    Journal of Physics Condensed Matter   10 ( 49 )   11519 - 11523   1998.12

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    DOI: 10.1088/0953-8984/10/49/037

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  • Observation of pressure-induced superconductivity in the megabar region Reviewed

    K. Amaya, K. Shimizu, M. I. Eremets, T. C. Kobayashi, S. Endo

    Journal of Physics Condensed Matter   10 ( 49 )   11179 - 11190   1998.12

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    DOI: 10.1088/0953-8984/10/49/008

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  • Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO 2 Reviewed

    Kitaoka Yoshio, Kobayashi Tatsuo, Kōda Akihiro, Wakabayashi Hayato, Niino Yoshihiro, Yamakage Hirokazu, Taguchi Shinichiro, Amaya Kiichi, Yamaura Kazunari, Takano Mikio, Hirano Atushi, Kanno Ryoji

    J Phys Soc Jpn   67 ( 11 )   3703 - 3706   1998.11

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    From the 7Li nuclear magnetic resonance (NMR) and specific heatmeasurements of LiNiO2, consisting of a spin-1/2 triangular lattice, itis demonstrated that the previously suggested spin-glass-like freezingbelow Tsg=8 K, which is caused by defects of Li ions, is not the trueground state, but rather a quantum disordered state is realized without aspin gap. This state is characterized by power-law behavior of thetemperature dependence of the specific heat below 0.5 K. A spin-liquidstate with short-range ferromagnetic correlations is suggested from newinsight into the frustration of orbital ordering for doubly degenerateeg shells in the triangular lattice.

    DOI: 10.1143/JPSJ.67.3703

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  • Metallic CsI at Pressure of up to 220 Gigapascals Reviewed

    M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya

    Science   1998.4

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    DOI: 10.1126/science.281.5381.1333

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  • Enhancement of superconducting transition temperature in CeCu2Ge2 under high pressures Reviewed

    T. C. Kobayashi, T. Miyazu, N. Takeshita, K. Shimizu, K. Amaya, Y. Kitaoka, Y. Onuki

    J. Phys. Soc. Jpn.   67 ( 3 )   996 - 999   1998.4

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    Enhancement of superconducting transition temperature T c is confirmed at around 16 GPa in the pressure-induced superconductor CeCu2Ge2.The superconducting Hc-T c phase diagrams at the low-T c and high-T c pressure regions indicates that the heavy quasi particles form the singlet Cooper pairs.At both low-T c and high-T c pressure regions, Fermi liquid behavior of ρ∼ AT2 is observed only at low temperatures below 1 K in the normal state induced by the external field above Hc2.At 21 GPa where the superconductivity disappears down to 50 mK, the temperature region following ρ∼ AT2 increases drastically up to 40 K and the coefficient A decreases rapidly.These results indicate that the strongly correlated electrons are responsible essentially for the appearance of superconductivity in this system.

    DOI: 10.1143/JPSJ.67.996

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  • Magnetic-to-nonmagnetic transition in the ferromagnetic heavy-fermion compound CeRu2Ge2 at high pressures Reviewed

    T. C. Kobayashi, T. Miyazu, K. Shimizu, K. Amaya, Y. Kitaoka, Y. Onuki, M. Shirase, T. Takabatake

    Phys. Rev. B   57 ( 9 )   5025 - 5028   1998.4

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    DOI: 10.1103/PhysRevB.57.5025

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  • Phase diagram of a new spin-Peierls compound: p-CyDOV Reviewed

    T. Hamamoto, Y. Narumi, K. Kindo, K. Mukai, Y. Shimobe, T. C. Kobayashi, T. Muramatsu, K. Amaya

    Physica B   246   36 - 39   1998

  • Magnetic Properties of Oxygen Physisorbed in Cu-Trans-1,4-Cyclohexanedicarboxylic Acid Reviewed

    Wasuke Mori, Tatsuo C. Kobayashi, Junji Kurobe, Kuichi Amaya, Yasuo Narumi, Takayuki Kumada, Koichi Kindo, Hiroko Aruga Katori, Tuneaki Goto, Noboru Miura, Satoshi Takamizawa, Hirokazu Nakayama, Kizashi Yamaguchi

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS   306   1 - 7   1997.10

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    DOI: 10.1080/10587259708044542

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  • Observation of weak ferromagnetism in organic verdazyl radical crystal, p-CyDpTV Reviewed

    Kazuo Mukai, Masaaki Nuwa, Tomonari Morishita, Takaki Muramatsu, Tatsuo C. Kobayashi, Kiichi Amaya

    Chemical Physics Letters   272 ( 5-6 )   501 - 505   1997.7

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    DOI: 10.1016/S0009-2614(97)00529-0

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  • Magnetic Properties of One-Dimensional Heisenberg Chains with Ferromagnetic-Antiferromagnetic Bond Alternation Reviewed

    M. Hagiwara, Y. Narumi, K. Kindo, T. C. Kobayashi, H. Yamakage, K. Amaya, G. Schmauch

    J. Phys. Soc. Jpn.   66 ( 6 )   361 - 364   1997.6

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    We report the results of susceptibility and magnetization measurements on ferromagnetic-antiferromagnetic alternating chain compounds [Cu(TIM)]CuCl4 (TIM=2,3,9,10-tetramethyl-1,3,8,10-tetraenecyclo-1,4,8,11-tetraazatetradecane) and (4-BzpipdH)CuCl3 (4-BzpipdH=4-benzylpiperidinium). Magnetization curves of both compounds are compared to those calculated for an S=1 linear-chain Heisenberg antiferromagnet. From the fitting of susceptibility data to a numerical formula calculated for an S=1/2 ferromagnetic-antiferromagnetic alternating chain [Inog. Chem. 33 (1994) 5171], we have estimated theantiferromagnetic exchange constant J AF/k B=2.9 K, the ferromagnetic exchange constant |J F|/k B=4.7 K and the g-value of the magnetic moment g=2.06 for the former and J AF/k B=8.8 K, |J F|/k B=38.8 K and g=2.17 for the latter, which are different from the values reportedpreviously.

    DOI: 10.1143/JPSJ.66.1792

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  • High Pressure Methods at Low Temperatures and High Magnetic Field Reviewed

    M. I. Eremets, K. Amaya, K. Shimizu, T. C. Kobayashi

    Rev. High Pressure Sci. Technol.   7   469 - 474   1997.4

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    High-pressure cells which can be used in experiments at low temperatures and high magnetic fields are considered. New constructions of piston-cylinder, diamond anvil and other cells are presented. The recent development of a technique for resistance measurements in the megabar region above 150 GPa are presented. For the first time electrical measurements in the DAC with typical megabar anvils were performed with a sample of diameter 20 μm. The metallization of sulfur at 100 GPa, CsI at 120 GPa was achieved. Simultaneously, with electrical measurements the Raman spectra of sulfur were studied up to 100 GPa.

    DOI: 10.4131/jshpreview.7.469

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  • Pressure Induced Superconductivity in Some Simple Systems Reviewed

    K. Amaya, K. Shimizu, N. Takeshita, S. Kometani, M. I. Eremets, A. Onodera, T. C. Kobayashi, T. Mizutani, M. Ishizuka, S. Endo, M. Takai, N. Hamaya, I. Shirotani

    Rev. High Pressure Sci. Technol.   7   688 - 693   1997.4

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    Experimental techniques on production of ultra-high pressure at very low temperature, electrical resistance and magnetization measurement are developed for the purpose of searching for pressure-induced superconductivity in some simple systems. Previous results of pressure induced superconductivity of I, Br, Ca, SnI4 and C6I4O2 are reviewed and remaining problems are discussed shortly. Recent findings of metallization and superconductivity of O and S are also reported.

    DOI: 10.4131/jshpreview.7.688

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  • Magnetic properties of 1,5-dimethyl-6-oxoverdazyl radical crystal. Observation of a spin-Peierls transition in 3-(4-cyanophenyl)-1,5-dimethyl-6-oxoverdazyl radical, p-CyDOV Reviewed

    Kazuo Mukai, Naoki Wada, Javad, B. Jamali, Norio Achiwa, Yasuo Narumi, Koichi Kindo, Tatsuo Kobayashi, Kiichi Amaya

    Molecular Crystals and Liquid Crystals   305   499 - 508   1997

  • Magnetic properties of 1,5-dimethyl-6-oxoverdazyl radical crystals. Observation of a spin-Peierls transition in 3-(4-cyanophenyl)-1,5-dimethyl-6-oxoverdazyl radical, p-CyDOV Reviewed

    K Mukai, N Wada, JB Jamali, N Achiwa, Y Narumi, K Kindo, T Kobayashi, K Amaya

    CHEMICAL PHYSICS LETTERS   257 ( 5-6 )   538 - 544   1996.8

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    DOI: 10.1016/0009-2614(96)00577-5

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  • Superconductivity of Calcium under High Pressures Reviewed

    S. Okada, K. Shimizu, T. C. Kobayashi, K. Amaya, S. Endo

    J. Phys. Soc. Jpn   65 ( 7 )   1924 - 1926   1996.4

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    Electrical resistance of Ca is measured under pressures up to 150 GPa and at temperatures down to 0.05 K. Superconductivity is observed at temperatures below 3 K under pressures above 85 GPa. The superconducting transition temperature increases linearly with increasing pressure and reaches about 15 K at 150 GPa.

    DOI: 10.1143/JPSJ.65.1924

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  • High field heat capacities of some singlet ground state systems at very low temperatures Reviewed

    T. C. Kobayashi, A. Koda, K. Amaya

    Physica B: Condensed Matter   216 ( 3-4 )   304 - 306   1996.1

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    DOI: 10.1016/0921-4526(95)00500-5

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  • Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP Reviewed

    Kobayashi Tatsuo, Honda Hajime, Koda Akihiro, Amaya Kiichi

    J Phys Soc Jpn   64 ( 7 )   2609 - 2613   1995.7

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    Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C2H8N2)2NO2(ClO4) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu2+-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni2+(S=1)-chain adjacent to the Cu2+-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.

    DOI: 10.1143/JPSJ.64.2609

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  • Heat capacities of one-dimensional Heisenberg antiferromagnets under high magnetic fields Reviewed

    T. C. Kobayashi, A. Koda, H. Honda, C. U. Hong, K. Amaya, T. Asano, Y. Ajiro, M. Mekata, T. Yosida

    Physica B: Physics of Condensed Matter   211 ( 1-4 )   205 - 207   1995.5

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    DOI: 10.1016/0921-4526(94)00986-6

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  • NMR study of strongly correlated electron systems Reviewed

    Y. Kitaoka, H. Tou, G. -q. Zheng, K. Ishida, K. Asayama, T. C. Kobayashi, A. Kohda, N. Takeshita, K. Amaya, Y. Onuki, G. Geibel, C. Schank, F. Steglich

    PHYSICA B-CONDENSED MATTER   206 ( 1-4 )   55 - 61   1995.2

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    DOI: 10.1016/0921-4526(94)00365-3

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  • Heat capacity anomaly of CeCu2.05Si2 under magnetic fields Reviewed

    T. C. Kobayashi, A. Koda, H. Honda, K. Amaya, Y. Kitaoka, K. Asayama, C. Geibel, F. Steglich

    PHYSICA B-CONDENSED MATTER   206   600 - 602   1995.2

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  • Low Temperature Thermal and Magnetic Properties of Haldane-Gap Antiferromagnet TMNIN Reviewed

    Kobayashi Tatsuo, Kohda Akihiro, Amaya Kiichi, Ito Masakazu, Deguchi Hiroyuki, Takeda Kazuyoshi, Asano Takayuki, Ajiro Yoshitami, Mekata Mamoru

    J Phys Soc Jpn   63 ( 5 )   1961 - 1966   1994.5

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    Heat capacity and susceptibility measurements are performed downto 70 mK under magnetic fields in the Haldane-gap antiferromagnet(CH3)4NNi(NO2)3 (TMNIN). We have observedno magnetic long range order within our experimental range ofthe temperature down to 70 mK and the magnetic field up to7 T. The heat capacity reflects the field dependence of theenergy gap and show a broad anomaly above a critical fieldH C, which has been also observed in NENP. In theadiabatic magnetization measurement, the spin temperature showsa minimum around H C. These results are interpreted asincreasing of the energy gap above H C which maysuppress the expected long-range-ordering.

    DOI: 10.1143/JPSJ.63.1961

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  • Heat Capacities of Haldane-Gap Antiferromagnet NENP in Magnetic Field Reviewed

    Kobayashi Tatsuo, Tabuchi Yoshitaka, Amaya Kiichi, Ajiro Yoshitami, Yosida Taturu, Date Muneyuki

    Tokyo Sugaku Kaisya Zasshi   61 ( 5 )   1772 - 1776   1992

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    Heat capacity measurements of the quasi one-dimensional S=1 antiferromagnet Ni(C2H8N2)2NO2(ClO4) are performed in static magnetic fields up to 13 T. Applying a magnetic field, a broad anomaly appears below 5 K, which reflects the gap energy between the nonmagnetic ground state singlet and the excited states. The field-dependence of the energy gap estimated from the measured heat capacities gives the critical field values close to those obtained in high-field-magnetization measurements and non-zero gap remaining at the critical field. Within our experimental range of temperature and magnetic field, we have not observed any sharp peaks corresponding to the expected three dimensional magnetic long range ordering.

    DOI: 10.1143/JPSJ.61.1772

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  • Nuclear Spin-Lattice Relaxation of 139La in Superconducting (La1-xSrx)2CuO4 Reviewed

    Kobayashi Tatsuo, Wada Shinji, Kitaoka Yoshio, Asayama Kunisuke

    J Phys Soc Jpn   58 ( 8 )   2662 - 2664   1989.8

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    Nuclear spin-lattice relaxation times $T_{1}$ of 139La in high-$T_{\text{C } }$ superconductor (La1-xSrx)2CuO4 ($x{=}0.075$, 0.10) have been measured in zero field. $T_{1}^{-1}$ in the superconducting state decreases rapidly, indicating a superconducting energy gap formation, but no signs of $T_{1}^{-1}$ enhancement are observed just below $T_{\text{C } }$. $T_{1}^{-1}$ in the normal state shows slightly stronger temperature dependence than that expected from the Korringa relation ($T_{1}T$${=}$const.) observed in a highly Sr-doped, nonsuperconducting compound with $x{=}0.15$.

    DOI: 10.1143/JPSJ.58.2662

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  • Existence of the Minimum Coefficient in Temperature Linear Term of Heat Capacity in Superconducting (La1-xBax)2CuO4 Reviewed

    Kobayashi Tatsuo, Kumayasu Satoshi, Amaya Kiichi, Ishida Kenji, Kitaoka Yoshio, Asayama Kunisuke

    J Phys Soc Jpn   57 ( 7 )   2261 - 2263   1988.7

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    In high-$T_{\text{c } }$ superconductors (La1-xMx)2CuO4 (M$=$Ba, Sr), it has been reported that the heat capacity has a nonzero coefficient $\gamma$ in the temperature linear term. We investigated the detailed dependence of $\gamma$ on Ba doping. It was confirmed that $\gamma$ becomes zero for undoped La2CuO4. With increasing Ba concentration $x$, $\gamma$ increases markedly up to $x{=}0.02$ where the magnetic order almost disappears, while it decreases as superconductivity starts to appear and then has a minimum around $x{=}0.04$. With further increasing $x$, $\gamma$ increases again. These results may be due to a combined effect of two different contributions to $\gamma$.

    DOI: 10.1143/JPSJ.57.2261

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  • MAGNETIC PHASE-DIAGRAM IN (LA1-XBAX)2CUO4 Reviewed

    Y KITAOKA, K ISHIDA, T KOBAYASHI, K AMAYA, K ASAYAMA

    PHYSICA C   153   733 - 734   1988.6

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  • Anisotropic Energy Gap of Strong Electron-Phonon Coupling Superconductor HfV2 Reviewed

    Yoshio Kitaoka, Yutaka Kishimoto, Tatsuo Kobayashi, Kiichi Amaya, Kunisuke Asayama

    Japanese Journal of Applied Physics   26 ( 3-2 )   1253 - 1254   1987

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    DOI: 10.7567/JJAPS.26S3.1253

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  • 配位空間の化学 ―最新技術と応用―

    シーエムシー出版  2009 

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  • 圧力下におけるPbTeの電気伝導測定

    秋葉和人, 小林達生, 三宅厚志, 酒井英明, 酒井英明, 片山敬介, 村川寛, 花咲徳亮, 鷹岡貞夫, 上床美也, 徳永将史

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019

  • Hall effect in CeRh2Si2 under pressure

    Araki Shingo, Mitsui Riku, Kobayashi Tatsuo C., Imai Wataru, Miyazaki Misato, Settai Rikio, Braithwaite Daniel, Aoki Dai, Sakai Hironori

    Meeting Abstracts of the Physical Society of Japan   73 ( 2 )   1627 - 1627   2018.9

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    DOI: 10.11316/jpsgaiyo.73.2.0_1627

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  • Antiferromagnetic quantum critical point in CeRh2Si2

    Araki S., Onji T., Kitagawa S., Kobayashi T. C., Miyazaki M., Settai R., Sakai H.

    Meeting Abstracts of the Physical Society of Japan   71 ( 2 )   2009 - 2009   2016.9

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    &lt;p&gt;反強磁性CeRh2Si2のネール温度は約1GPaで消失する。その臨界圧力近傍ではフェルミ面の不連続変化,圧力誘起超伝導の存在が確認されている。本研究では,圧力下の精密なホール効果と電気抵抗測定をを行い,臨界圧力近傍の相図を明らかにし,超伝導の引力起源となる揺らぎの探索を行う。&lt;/p&gt;

    DOI: 10.11316/jpsgaiyo.71.2.0_2009

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  • 静水圧性が向上して明らかになった相転移

    小林達生, 荒木新吾

    高圧力の科学と技術   26 ( 1 )   21 - 26   2016

  • 21pBL-13 Superconductivity near antiferromagnetic quantum critical point in CeNiGe_3

    Kitagawa S., Araki S., Kobayashi T. C., Ikeda Y., Yoshizawa H.

    Meeting Abstracts of the Physical Society of Japan   71   2294 - 2294   2016

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    DOI: 10.11316/jpsgaiyo.71.1.0_2294

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  • 22aPS-34 Crystal synthesis and high pressure effect on rare earth ferromagnetic Bi_3R_4 with noncentrosymmetric cubic structure.

    Sogabe Y., Furutani A., Araki S., Sekiya T., Kitagawa S., Kobayashi T. C., Inada Y.

    Meeting Abstracts of the Physical Society of Japan   71   2427 - 2427   2016

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    DOI: 10.11316/jpsgaiyo.71.1.0_2427

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  • 19pBG-9 Characterization of 14 K superconducting phase of K-doped picene

    Kubozono Yoshihiro, Terao Takahiro, Nishiyama Saki, Zheng Lu, Goto Hidenori, Eguchi Ritsuko, Okamoto Hideki, Kobayashi Tatsuo C., Kambe Takashi, Sugino Hisako, Gohda Shin

    Meeting Abstracts of the Physical Society of Japan   71   1851 - 1851   2016

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  • High field NMR study of valence state in CeCu2Si2 under puressure

    Takamatsu Y., Fujiwara K., Suwada Y., Motoyama G., Miyoshi K., Kobayashi T. C., Kitagawa K., Sasaki T., Goto T., Seiro S., Geibel C., Steglich F.

    Meeting Abstracts of the Physical Society of Japan   71   2008 - 2008   2016

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  • 22aBN-6 Emergence of a wide variety of superconductors prepared by a metal doping of LnOBiS_2 (Ln: lanthanide atoms)

    Nishiyama S., Uesugi E., Nguyen Thi Le Huyen, Kagayama T., Shimizu K., Goto H., Eguchi R., Kitagawa S., Kobayashi T., Kubozono Y.

    Meeting Abstracts of the Physical Society of Japan   71   2377 - 2377   2016

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    DOI: 10.11316/jpsgaiyo.71.1.0_2377

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  • 20pPSB-21 Pressure Effect in Ferromagnetic CeNiSb_2

    Imai K., Sekiya T., Kitagawa S., Araki S., Kobayashi T. C., Onuki Y.

    Meeting Abstracts of the Physical Society of Japan   71   2125 - 2125   2016

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    DOI: 10.11316/jpsgaiyo.71.1.0_2125

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  • 20pPSB-20 Magnetization measurement with Hall sensor under high pressure in CeAgSb_2

    Araki S., Mashiyama H., Fujiwara Y., Kitagawa S., Kobayashi T.C.

    Meeting Abstracts of the Physical Society of Japan   71   2124 - 2124   2016

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    DOI: 10.11316/jpsgaiyo.71.1.0_2124

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  • 22aPS-79 Cu-NMR study of single crystal CeCu_2Si_2 under high pressure

    Suwada Y., Fujiwara K., Motoyama G., Miyoshi K., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   2170 - 2170   2015

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    DOI: 10.11316/jpsgaiyo.70.1.0_2170

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  • 22aAC-9 Search for plastic ice under high pressure

    S.Yamakawa, T. C.Kobayashi, K.Shimizu, K.Koga, H.Tanaka

    Meeting Abstracts of the Physical Society of Japan   70   1830 - 1830   2015

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  • 17aPS-16 Cu-NMR study of single crystal CeCu_2Si_2 under high pressure

    Suwada Y., Fujiwara K., Motoyama G., Miyoshi K., Kobayashi T. C., Sasaki T., Goto T., Seiro S., Geibel C., Steglich F.

    Meeting Abstracts of the Physical Society of Japan   70   1813 - 1813   2015

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    DOI: 10.11316/jpsgaiyo.70.2.0_1813

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  • 17aPS-18 Hall effect in CeRh_2Si_2 under high pressure

    Araki S., Onji T., Kitagawa S., Kobayashi T. C., Miyazaki M., Settai R., Sakai H.

    Meeting Abstracts of the Physical Society of Japan   70   1814 - 1814   2015

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    DOI: 10.11316/jpsgaiyo.70.2.0_1814

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  • 17aDA-8 Pressure induced ferromagnetic quantum criticality on CeTiGe_3

    Kitagawa S., Kawashima G., Araki S., Kobayashi T. C., Inamdar M., Thamizhavel A., Dhar S. K.

    Meeting Abstracts of the Physical Society of Japan   70   1769 - 1769   2015

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    DOI: 10.11316/jpsgaiyo.70.2.0_1769

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  • 18aDB-3 P-T-x phase diagram in the iron - based superconductor Ca_<1-x>La_xFeAs_2

    Sekiya T., Kitagawa S., Araki S., Kobayashi T. C., Nishimoto N., Ioka S., Fujimura K., Mizukami T., Kudo K., Nohara M.

    Meeting Abstracts of the Physical Society of Japan   70   1989 - 1989   2015

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    DOI: 10.11316/jpsgaiyo.70.2.0_1989

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  • 7pBD-9 Emergence of High-T_c Superconducting Phase in (NH_3)_yCs_<0.4>FeSe under high pressure

    Izumi M., Araki S., Kobayashi T. C., Prassides Kosmas, Sun Liling, Kubozono Y, Sakata M., Sakai Y., Zheng Lu, Goto H., Nakamoto Y., Kagayama T., Shimizu K., Onji T.

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   336 - 336   2014

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    DOI: 10.11316/jpsgaiyo.69.2.3.0_336_2

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  • 8aPS-39 Cu-NQR and NMR study of CeCu_2Si_2 under high pressure

    Suwada Y., Fujiwara K., Motoyama G., Miyoshi K., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   366 - 366   2014

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    DOI: 10.11316/jpsgaiyo.69.2.3.0_366_1

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  • 遍歴強磁性体U3P4の圧力下メタ磁性転移

    荒木新吾, 林田みなみ, 西海尚人, 眞鍋博紀, 池田陽一, 小林達生, 村田惠三, WISNIEWSKI P., 稲田佳彦, 青木大, 大貫惇睦, 大貫惇睦, 山本悦嗣, 芳賀芳範

    日本物理学会講演概要集   68 ( 1 )   2013

  • U3P4の高圧下ホール効果

    林田みなみ, 荒木新吾, 真鍋博紀, 池田陽一, 小林達生, 稲田佳彦, 村田惠三, WISNIEWSKI P., 青木大, 大貫惇睦, 大貫惇睦, 山本悦嗣, 芳賀芳範, 藤原賢二

    日本物理学会講演概要集   67 ( 1 )   2012

  • 23aPS-24 Pressure dependence of Cu-NQR frequency in CeCu_2Si_2

    Iwata M., Fujiwara K., Miyoshi K., Takeuchi J., Ikeda Y., Araki S., Kobayashi T. C., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   582 - 582   2011.8

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  • 22aGC-2 Ni Substitution Effects on Heavy-Electron Superconductor CeCu_2Si_2

    Ikeda Y., Ito Y., Araki S., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   492 - 492   2011.8

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  • 22aPS-88 Electrical Resistivity Measurement of Superconducting Einstein Solid A_xV_2Al_<20>(A=Al,Ga) under High Pressure

    Kawasaki Y., Ikeda Y., Araki S., Kobayashi T. C., Onosaka A., Okamoto Y., Hiroi Z.

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   529 - 529   2011.8

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  • 22aGC-1 Hall effect in single-crystal CeCu_2Si_2 under high pressure

    Shinohara T., Shiroyama Y., Araki S., Ikeda Y., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   492 - 492   2011.8

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  • 25aPS-37 Magnetic properties and arrangements of molecular oxygen adsorbed in a MFI zeolite

    Hori A., Wanikawa Y., Kubota Y., Kuwana K., Kobayashi T. C., Matsuo A., Kindo K., Hakuman M., Nakai K., Kim J., Kato K., Takata M., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   464 - 464   2011.3

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  • 25aEE-3 Pressure effect of Rh-doped CaFe_2As_2 : Relation between lattice-collapse and superconductivity

    Oshiro Y., Araki S., Danura M., Kudo K., Nohara M., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   524 - 524   2011.3

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  • 28aEH-8 Electrical Resistivity of Single Crystalline CeCu_2Si_2 under High Pressure

    Ito Y., Ikeda Y., Araki S., Shiroyama Y., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   673 - 673   2011.3

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  • 25aPS-127 Thermal expansion of CeCu_2Si_2 under high pressure

    Hayashida M., Araki S., Ikeda Y., Kobayashi T.C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   543 - 543   2011.3

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  • 28aEH-9 Hall effect under pressure on single-crystal CeCu_2Si_2-II

    Shiroyama Y., Araki S., Ikeda Y., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   673 - 673   2011.3

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  • Heat capacity and ac-susceptibility measurements of SmOs4Sb12 under high pressure (Proceedings of the International Conference on Heavy Electrons 2010 (ICHE2010))

    Journal of the Physical Society of Japan   80   SA034 - 1〜3   2011

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  • 23pPSB-15 AC heat capacity measurement in SmOs_4Sb_<12> under high pressure

    Kawasaki K., Miyazawa K., Araki S., Ikeda Y., Kobayashi T. C., Kotegawa H., Sugawara H., Kikuchi D., Sato H.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   531 - 531   2010.8

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  • 26aWL-8 Magnetic properties of molecular oxygen adsorbed in MFI zeolite

    Kuwana K., Kobayashi T. C., Hori A., Matsuo A., Kindo K., Hakuman M., Nakai K., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   447 - 447   2010.8

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  • 24aWG-12 Hall effect under pressure on single-crystal CeCu_2Si_2

    Shiroyama Y., Ikeda Y., Araki S., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   545 - 545   2010.8

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  • 23pPSB-43 Pressure and Co-substitution Effects of the Valence Transition in Ce(Ni,Co)Sn System

    Ikeda Yoichi, Ito Yuzo, Araki Shingo, Kobayashi Tatsuo C.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   537 - 537   2010.8

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  • 26aWL-9 The molecular arrangement of O_2 absorbed in MFI zeolite

    Wanikawa Y., Kubota Y., Hori A., Kuwana K., Kobayashi T. C., Hakuman M., Nakai K., Kim J., Kato K., Takata M., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   448 - 448   2010.8

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  • 23pPSB-49 Electrical resistivity and thermal expansion of single-crystalline CeCu_2Si_2 under pressure

    Araki S., Ikeda Y., Shiroyama Y., Ito Y., Hayashida M., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   539 - 539   2010.8

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  • 21pGF-14 Pressure induced ferromagnetic-nonmagnetic transition on U_3P_4

    Araki S., Manabe H., Kobayashi T. C., Inada Y., Murata K., Wisniewski P., Aoki D., Onuki Y., Yamamoto E., Haga Y., Fujiwara K.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   633 - 633   2010.3

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  • 22pPSA-35 Magnetic properties of molecular oxygen adsorbed in MFI zeolite

    Kuwana K., Hori A., Kobayashi T. C., Matsuo A., Kindo K., Hakuman M., Nakai K., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   506 - 506   2010.3

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  • 22pEF-8 Correlation between magnetic properties and arrangements of molecular oxygen adsorbed in a microporous coordination polymer Cu-CHD

    Hori A., Kobayashi T. C., Kubota Y., Matsuo A., Kindo K., Kim J., Kato K., Takata M., Sakamoto H., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   482 - 482   2010.3

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  • 21aPS-37 Heat capacity measurement in SmOs_4Sb_<12> under high pressure

    Miyazawa K., Araki S., Kobayashi T. C., Kotegawa H., Sugawara H., Kikuchi D., Sato H.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   610 - 610   2010.3

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  • 22pGH-11 High-pressure NMR on SrFe_2As_2 with large indenter

    Kawazoe T., Kotegawa H., Sugawara H., Takeda K., Tou H., Kobayasi T. C.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   661 - 661   2010.3

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  • 22pPSA-36 The molecular arrangement of O_2 absorbed in MFI zeolite

    Wanikawa Y., Kubota Y., Hori A., Kuwana K., Kobayashi T. C., Hakuman M., Nakai K., Kim J., Kato K., Takata M., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   506 - 506   2010.3

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  • 21aPS-56 Hall effect under pressure on CeCu_2Si_2

    Shiroyama Y., Araki S., Kobayashi T. C., Seiro S., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   614 - 614   2010.3

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  • 27aQJ-9 High-Field Magnetization process of O_2 Adsorbed in a Microprous Coordination Polymer CPL-1 at Various Temperatures

    Hori A., Kobayashi T. C., Matsuo A., Kindo K., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   367 - 367   2009.8

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  • 27pPSA-20 Magnetic properties and the arrangement of O_2 adsorbed in a microporous coordination polymer Cd(bpmdc)(bpy)

    Miyamura M., Minakata C., Wanikawa Y., Kubota Y., Hori A., Toda Y., Kobayashi T. C., Matsuo A., Kindo K., Takata M., Tanaka D., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   385 - 385   2009.8

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  • 26aPS-131 Pressure-temperature phase diagram on FeTe

    Oshiro Y., Kobayashi T. C., Nohara M.

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   507 - 507   2009.8

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  • 27pPSB-34 High field magnetization process of O_2 adsorbed in microporous coordination polymers Zn_2(TCBP)

    Matsuo A., Hori A., Toda Y., Sakamoto H., Higuchi M., Matsuda R., Kitagawa S., Kobayashi T. C., Kindo K.

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   467 - 467   2009.3

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  • 27pPSB-42 The arrangement of O_2 adsorbed in coordination polymer Zn_2(TcBP)

    Hori A., Toda Y., Kobayashi T. C., Minakata C., Kubota Y., Takata M., Sakamoto H., Matsuda R., Higuchi M., Kitagawa S., Schroder M.

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   469 - 469   2009.3

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  • High pressure NQR study of valence and spin state in heavy fermion superconductor CeCu2Si2

    Solid state physics   44 ( 6 )   393 - 398   2009

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  • 27aPS-69 Pressure effect of itinerant ferromagnet U_3P_4

    Manabe H., Hori A., Kobayashi T. C., Takeshita N., Murata K., Inada Y., Wisniewski P., Aoki D., Yamamoto E., Haga Y., Onuki Y.

    Meeting Abstracts of the Physical Society of Japan   64.1.3   546   2009

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    DOI: 10.11316/jpsgaiyo.64.1.3.0_546_4

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  • 21aPS-74 Pressure effect of ferromagnet CeTiGe_3

    Manabe H., Kobayashi T. C., Kotegawa H., Takeshita N., Dhar S. K., Kulkarni R., Manfrinetti P.

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   510 - 510   2008.8

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  • 21pPSB-26 Magnetic properties and the arrangement of O_2 adsorbed in microporous coordination polymers CCHD II

    Hori A., Toda Y., Suzuki Y., Kobayashi T. C., Kubota Y., Matsuo A., Kindo K., Takata M., Sakamoto H., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   408 - 408   2008.8

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  • 21pPSB-27 Magnetic properties and the arrangement of O_2 adosorbed in microporous coordination polymers Cd (bpndc) (bpy)

    Kubota Y., Minakata C., Hori A., Toda Y., Suzuki Y., Kobayashi T.C., Matsuo A., Kindo K., Takata M., Tanaka D., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   408 - 408   2008.8

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  • 23pPSA-43 Pressure effect of CePtZn

    Toda Y., Hidaka H., Kotegawa H., Kobayashi T.C., Dhar S.K., Kulkarni R., Manfrinetti P.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   545 - 545   2008.2

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  • 23pPSA-30 Nuclear magnetic relaxation of CeCu_2Si_2 under high pressure

    Hata Y., Fujiwara K., Maeda E., Miyoshi K., Takeuchi J., Kotegawa H., Kobayashi T.C., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   542 - 542   2008.2

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  • 23aPS-102 Magnetic properties and the arrangement of O_2 adsorbed in microporous coordination polymers Cu-CHD

    Hori A., Yamaguchi T., Kobayashi T.C., Kubota Y., Matsuo A., Kindo K., Takata M., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   449 - 449   2008.2

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  • 23pPSB-38 Crystalline structure and electrical resistivity in UIr under Pressure

    Akazawa T., Hori A., Tabira K., Irie Y., Kotegawa H., Kobayashi T.C., Takeda K., Ohishi Y., Yamamoto E., Ikeda S., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   555 - 555   2008.2

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  • 24aWB-4 Magnetic properties of O_2 adsorbed in microporous coordination polymers

    Kobayashi T. C., Hori A., Yamaguchi T., Matsuo A., Kindo K., Kubota Y., Takata M., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   501 - 501   2007.8

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  • 21pPSB-6 Observation of Charge Fluctuations in Skutterudite Compounds through NQR Measurements

    Irie Y., Kotegawa H., Hidaka H., Kobayashi T. C., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   574 - 574   2007.8

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  • 21pPSB-4 Sb-NQR study of PrOs_4Sb_<12> under pressure III

    Katayama K., Kawasaki S., Zheng G. -q., Kotegawa H., Kobayashi T. C., Sugawara H., Kikuchi D., Sato H.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   573 - 573   2007.8

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  • 21pXA-2 Low-energy spin fluctuations of the ferromagnetic heavy fermion YbPdCu_4

    Yokoyama T., Yamamoto A., Wada S., Tabira K., Kotegawa H., Kobayashi T. C., Sarrao J. L.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   558 - 558   2007.8

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  • 21pPSB-10 Magnetization and specific heat measurements at high pressures in SmOs_4Sb_<12>

    Tabira K., Hidaka H., Kotegawa H., Kobayasi T. C., Kikuti D., Tanaka K., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   574 - 574   2007.8

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  • 21aXA-1 Electrical resistivity and AC-susceptibility measurements on Pr(Fe_<0.95>Ru_<0.05>)_4P_<12> under high pressure

    Hidaka H., Toda Y., Kotegawa H., Kobayashi T. C., Motomura Y., Aoki Y., Kikuchi D., Sato H.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   513 - 513   2007.8

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  • 22pXA-14 Relationship between pressure-induced 1st order phase transition and superconductivity

    Kotegawa E., Hori A., Irie Y., Hidaka H., Kobayashi T. C., Akazawa T., Yamamoto E., Ikeda S., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   617 - 617   2007.8

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  • 21pXA-3 Quantum criticality associated with the valence fluctuation in YbAuCu_4

    Yamamoto A, Yokoyama T, Wada S, Nakai Y, Ihara Y, Ishida K, Tabira K, Kotegawa H, Kobayashi T. C, Sarrao J. L

    Meeting abstracts of the Physical Society of Japan   62 ( 2 )   2007.8

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    DOI: 10.1143/JPSJ.76.063709

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  • 21aWK-2 ^<121,123>Sb-NQR study in SmOs_4Sb_<12>

    Kotegawa H., Hidaka H., Irie Y., Kobayashi T. C., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   643 - 643   2007.2

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  • 20pWP-13 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5

    Wada N., Kotegawa H., Fukushima S., Hidaka H., Kobayashi T. C., Shishido H., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   634 - 634   2007.2

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  • 18pPSB-6 Anomalous enhancement of residual resistivity in pressure-induced superconductor UIr

    Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   529 - 529   2007.2

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  • 18pWK-6 Cu-NQR/NMR Study in CeCu_2Si_2 under high pressure

    Fujiwara K., Tatsumi T., Kotegawa H., Kobayashi T. C., Kitaoka Y., Geibel C., Steglioh F.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   505 - 505   2007.2

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  • 18pPSB-5 Pressure dependence of Electrical Resistivity in UIr

    Akazawa T., Hidaka H., Kotegawa H., Fukushima S., Hori A., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   528 - 528   2007.2

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  • 18pPSB-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure

    Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Yamamoto E., Ikeda S., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   529 - 529   2007.2

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  • Structural materials science of micro-porous materials using synchrotron radiation X-ray diffraction

    Zeolite news letter   24 ( 3 )   80 - 87   2007

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  • 23pPSA-52 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5

    Wada N., Kotegawa H., Hidaka H., Kobayashi T.C., Shishido H., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   61 ( 2 )   418 - 418   2006.8

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  • 25aYA-3 A study of the pressure-induced insulating phase on PrFe_4P_<12>

    Hidaka H., Wada N., Kotegawa H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   61 ( 2 )   482 - 482   2006.8

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  • 25pYA-1 ^<121,123>Sb-NMR/NQR study in SmOs_4Sb_<12>

    Kotegawa H., Hidaka H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   61 ( 2 )   497 - 497   2006.8

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  • 24pYA-3 Pressure-induced superconductivity in a ferromagnet UIr

    Kobayashi T.C., Hori A., Fukushima S., Hidaka H., Kotegawa H., Akazawa T., Settai R., Ikeda S., Yamamoto E., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   61 ( 2 )   465 - 465   2006.8

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  • 29pRA-13 Pressure effect of CeNiGe_3 and CeNi_2Ge_2

    Miyoshi T., Takeda K., Fukushima S., Hidaka H., Kotegawa H., Kobayashi T.C., Nakashima M., Thamizhavel A., Settai R., Onuki Y., Kawasaki S., Kitaoka Y., Fukuhara T., Maezawa K., Itoh K.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   614 - 614   2006.3

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  • 27aUB-5 Sb-NQR study in SmOs_4Sb_<12>

    Kotegawa H., Hidaka H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   512 - 512   2006.3

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  • 29pPSA-51 Abnormal increase of residual resistivity in multi-ferromagnet UIr

    Hori A., Hidaka H., Kotegawa H., Kobayashi T.C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   640 - 640   2006.3

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  • 27aUF-9 Cu-NQR Study in CeCu_2Si_2 under high pressure

    Fujiwara K., Tatsumi T., Kotegawa H., Kobayashi T.C., Kitaoka Y., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   519 - 519   2006.3

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  • 27aPS-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure

    Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Ikeda S., Yamamoto E., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   521 - 521   2006.3

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  • 27pTC-9 ^<73>Ge-NQR study of CeNi_2Ge_2 II

    Sada T., Kawasaki S., Mukuda H., Kitaoka Y., Miyoshi T., Kotegawa H., Kobayashi T.C., Fukuhara T., Maezawa K., Itoh K.M., Haller E.E.

    Meeting Abstracts of the Physical Society of Japan   61.1.3   554   2006

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    DOI: 10.11316/jpsgaiyo.61.1.3.0_554_1

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  • 19pXD-2 Physical properties of YbXCu_4(X=In, Cu) under high pressure

    Nakamura M., Otani M., Mito T., Wada S., Koyama T., Kotegawa H., Kobayashi T., Ishizuka M., Sarrao J. L., Reiffers M., Idzilowski B.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   382 - 382   2005.8

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  • 19pPSA-81 Study of erectrical resistivity anormalies and Fermi surface of RAgSb_2(R=Ce, La)

    Watanabe Y., Inada Y., Nogami Y., Hidaka H., Kotegawa H., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   413 - 413   2005.8

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  • 21pPSB-1 High field magnetizatoin process of adsorbed oxygen molecules chain in a nano-channel

    Matsuo A., Matsuda R., Chiba T., Uemura T., Kitagawa S., Kobayashi T., Kindo K.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   328 - 328   2005.8

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  • 19aPS-15 Pressure effect on YbPd_2Si_2 and YbCu_5

    Miki T., Kotegawa H., Kobayashi T. C., Sugawara H., Mito T., Wada S., Reiffers M., Idzikowski B.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   372 - 372   2005.8

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  • 20pYF-3 Anomalous magnetic properties of O_2-O_2 dimer

    Kobayashi T. C., Chiba T., Matsuo A., Kindo K., Matsuda R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   696 - 696   2005.8

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  • 22aYG-7 A study of the pressure-induced insulating phase in PrFe_4P_<12>

    Hidaka H., Fukushima S., Hori A., Kotegawa H., Kobayashi T. C., Fujiwara K., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   503 - 503   2005.8

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  • 20aYG-5 ^<73>Ge-NQR study of CeNi_2Ge_2

    Sada T., Kawasaki S., Mukuda H., Kitaoka Y., Miyoshi T., Kitagawa H., Kobayashi T., ukuhara T., Maezawa K., Itoh K., Haller E. E.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   421 - 421   2005.8

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  • 22aXD-9 Coexistence of ferromagnetism and superconductivity In UIr : AC-susceptibility measurement under high pressure

    Fukushima S., Kotegawa H., Hidaka H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   500 - 500   2005.8

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  • 22aXD-8 Anisotropy on electrical conduction for multi-ferromagnetic phases under high pressure In UIr

    Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   500 - 500   2005.8

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  • 21pYF-3 Superconductivity in Heavy Fermions : Discovered in Japan

    Onuki Y., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   488 - 488   2005.8

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  • 20aYG-6 Cu-NQR Study in CeCu_2Si_2 under high pressure

    Fujiwara K., Tatsumi T., Kotegawa H., Kobayashi T. C., Kitaoka Y., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   421 - 421   2005.8

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  • 20aYG-3 Superconductivity in antifferomagnetic state of CeNiGe_3

    Miyoshi T., Takeda K., Fukushima S., Hidaka H., Kotegawa H., Kobayashi T., Tabata K., Nakashima M., Thamizhavel A., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   420 - 420   2005.8

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  • 25aPS-63 Anisotropy on RAgSb_2(R=Ce,La)

    Watanabe Y., Inada Y., Hidaka H., Kotegawa H., Kobayashi T.C., Matsuda T.D., Aoki D.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   537 - 537   2005.3

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  • 25aPS-27 Hall effect in the pressure-induced insulating state of PrFe_4P_<12>

    Hidaka H., Hori A., Kotegawa H., Kobayashi T. C., Harima H., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   528 - 528   2005.3

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  • 25pTA-11 ^<31>P-NMR Study on Pressure Induced Insulating State in PrFe_4P_<12>

    Kotegawa H., Shimaoka Y., Hidaka H., Miki T., Kobayashi T., Fujiwara K., Kikuchi D., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   551 - 551   2005.3

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  • 27pYK-1 Direct observation of hydrogen molecules adsorbed onto a microporous coordination polymer

    Kubota Yoshiki, Takata Masaki, Matsuda Ryotaro, Kitaura Ryo, Kitagawa Susumu, Kobayashi Tatsuo, Kato Kenichi, Sakata Makoto

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   822 - 822   2005.3

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  • 25aPS-8 AC-Susceptlbility on Ferromagnetic Superconductor UIr without Inversion Symmetry

    Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   524 - 524   2005.3

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  • 25aPS-7 Powder X-ray Diffraction Study on UIr under Quasi-Hydrostatic Pressure

    Akazawa T., Hidaka H., Takeda K., Kotegawa H., Fukushima S., Hori A., Kobayashi T. C., Ohishi Y., Yamamoto E., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   523 - 523   2005.3

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  • 24aTA-3 Cu-NQR Study in CeCu_2Si_2 under high pressure

    Shimaoka Y., Kotegawa H., Kobayashi T.C., Fujiwara K., Nomura Y., Kitaoka Y., Geibel C., Steglich F.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   484 - 484   2005.3

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  • 24aTA-2 Pressure dependence of the unit cell volume in CeCu_2Ge_2 at low temperature

    Takeda K., Kobayashi C., Hidaka H., Shimizu K., Adachi T., Ohishi Y., Takata M., Watanuki T., Shimomura S., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   484 - 484   2005.3

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  • 25aPS-9 Anisotropy on electrical conduction under high pressure in UIr

    Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., IkedaS., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   524 - 524   2005.3

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  • Pressure-induced Superconductivity in UIr

    小林達生, 日高宏之, 福島賢, 小手川恒, 赤沢輝彦, 摂待力生, 大貫惇睦, 山本悦嗣, 芳賀芳範

    固体物理   40, 415-420 ( 6 )   2005

  • Direct Observation of Hydrogen Molecules adsorbed in a Coordination Polymer

    Yoshiki Kubota, Masaki Takata, Ryotaro Matsuda, Ryo Kitaura, Susumu Kitagawa, Tatsuo C. Kobayashi, Kenichi Kato, Makoto Sakata

    ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES   61   C403 - C403   2005

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    DOI: 10.1107/S0108767305082917

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  • 14pPSA-59 Pressure-induced metal-insulator transition in PrFe_4P_<12> II

    Hidaka H, Hori A, Kotegawa H, Kobayashi T C, Harima H, Kobayashi M, Sugawara H, Sato H

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   558 - 558   2004.8

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  • 14pPSA-74 Pressure effect on SmOs_4Sb_12

    Kotegawa H, Miki T, Hidaka H, Kobayashi T C, Kikuchi D, Sugawara H, Sato H

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   561 - 561   2004.8

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  • 14pPSA-35 AC-Susceptibility on Ferromagnetic Superconductor Ulr without inversion Symmetry

    Kotegawa H, Fukushima S, Hidaka H, Kobayashi T C, Akazawa T, Haga Y, Yamamoto E, Onuki Y

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   552 - 552   2004.8

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  • 15aRD-4 Superconductivity around a ferromagnetic quantum critical point in UIr without inversion symmetry

    Akazawa T, Hidaka H, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   576 - 576   2004.8

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  • 15aRD-5 Magnetization measurement of UIr under high pressure

    Hidaka H, Akazawa T, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   576 - 576   2004.8

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  • 13aRD-12 Cu-NQR study in CeCu_2Si_2 under high pressure

    Shimaoka Y, Kotegawa H, Kobayashi T, Fujiwara K, Kitaoka Y, Geibel C, Steglich F

    Meeting abstracts of the Physical Society of Japan   59 ( 2 )   457 - 457   2004.8

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  • 28pPSA-34 Pressure-induced metal-insulator transition in the filled skutterudite PrFe_4P_<12>

    Hidaka H, Kotegawa H., Kobayashi T. C., Ando I., Harima H., Kobayashi M., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   610 - 610   2004.3

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  • 28aXD-12 Magnetization measurement of UIr under high preasure

    Hidaka H., Akazawa T., Kobayashi T. C., Yamamoto E., Haga Y, Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   552 - 552   2004.3

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  • 27aXD-8 The pressure-temperature phase diagram in CeNiGe_3

    Kobayashi T. C., Tabata K., Nakashima M., THAMIZHAVEL Arumugamu, Hedo M., Uwatoko Y., Shimizu K., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   518 - 518   2004.3

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  • 27aPS-97 Magnetism of adsorbed O_2 in porous Cu complex assemblies

    Suzuki M, Hosokawa K, Matsuda R, Kitaura R, Matsuo A., Kindo K., Kitagawa S, Kobayashi T. C

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   458 - 458   2004.3

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  • 28aXD-13 Pressure Induced Superconductivity in UIr without inversion symmetry

    Akazawa T, Hidaka H, Fujiwara T, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   553 - 553   2004.3

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  • High-Pressure NMR Study of Heavy Fermion Spinel LiV_2O_4

    FUJIWARA Kenji, SHIMAOKA Yoshiyuki, KOBAYASHI Tatsuo

    The Review of High Pressure Science and Technology   13 ( 4 )   314 - 319   2003.11

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    We have developed high-pressure NMR technique with an Indenter Cell using NiCrAl alloy. It was designed to set easily into a conventional dilution fridge and/or high field magnet. We have succeeded in 7Li-NMR measurement of a heavy fermion spinel LiV2O4 in T-range between 60 mK and 30 K under pressure up to 4.7 GPa. At ambient pressure, 1/T1 shows a broad maximum around 50 K and is proportional to the temperature below 6 K. This is quite similar to the relaxation behavior in f-electron HF systems. However, 1/T1T becomes larger with applying higher pressure below 10 K and does not obey T1T = constant relation down to 1 K. Knight shift K, meanwhile, is independent of pressure above 2 GPa, indicating that the uniform component of susceptibility χ(0) does not change under high pressure. Some antiferromagnetic fluctuations with wave vector q ≠ 0 dominate relaxation rate in LiV2O4 near the boundary of the pressure induced insulating phase.

    DOI: 10.4131/jshpreview.13.314

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  • Pressure-induced charge-ordering in LiV_2O_4 II

    Takeda K., Hidaka H., Kobayashi T. C., Shimizu K., Miyoshi K., Fujiwara K., Takeuchi J., Nishibori E., Takata M., Sakata M., Adachi T., Ohishi Y., Watanuki T., Shimomura O.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   543 - 543   2003.8

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  • NMR measurement of uranium dioxide UO_2 under high pressure, III

    Sakai H., Kato H., Tokunaga Y., Kambe S., Walstedt R. E., Nakamura A., Tateiwa N., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   423 - 423   2003.8

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  • Phase Diagram of UIr under Quasi-Hydrostatic Pressure

    Akazawa T., Hidaka H., Tabata K., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   541 - 541   2003.8

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  • The resistivity of CePtGe_2 and Ce_3RhGa_<10> under high pressure

    Kirita S., Thamizhavel Arumugamu, Takeuti T., Tabata K., Kobayashi T. C., Galatanu Andri, Yamamoto E., Settai R., Ramakrishnan Srinivasan, Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   472 - 472   2003.8

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  • Electrical Resistivities of CeNi_2Al_5 and CeNiGe_3 under Pressure

    Nakashima M., Tabata K., Ueda T., Yamamoto T., Okuda Y., Kobayashi T. C., Hedo M., Uwatoko Y., Mori N., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   472 - 472   2003.8

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  • De Haas-van Alphen Effect under Pressure in UGe_2 III

    Settai R., Haga Y., Nakashima M., Yamamoto E., Kobayashi T. C., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   474 - 474   2003.8

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  • Magnetic Mesurement of PrFe_4P_<12> under High Pressure

    Hidaka H., Ando I., Tabata K., Shimizu K., Kobayashi T. C., Harima H., Kobayashi M., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   458 - 458   2003.8

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  • Electrical Resistivity Mesurements of Filled Skutterudite PrFe_4P_<12> under high pressure

    Ando I., Tabata K., Kobayashi T. C., Hidaka H., Harima H., Kobayashi M., Sugawara H., Sato H.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   458 - 458   2003.8

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  • Magnetism of adsorbed O_2 in Cu complex with microporous

    Suzuki M., Kobayashi T. C., Matsuo A., Kindo K., Mita Y., Kobayashi M., Matsuda R., Kitaura R., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   58 ( 2 )   370 - 370   2003.8

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  • NMR measurement of uranium dioxide UO_2 under high pressure, II

    Sakai H., Kato H., Tokunaga Y., Kambe S., Walstedt R. E., Nakamura A., Tateiwa N., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   427 - 427   2003.3

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  • Pressure Dependence of the Magnetization in the Itinerant Ferromagnet Ulr

    Hidaka H., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   568 - 568   2003.3

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  • Molecular oxygen ladder I : Synthesis of porous metal complex assemblies toward the bottom-up construction and their oxygen adsorption properties

    Kitagawa S., Matsuda R., Kitaura R., Chang H-C., Kobayashi T. C., Takata M.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   782 - 782   2003.3

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  • Oxygen molecule ladder II : Direct observation of adsorbed gas molecules by the MEM charge density study

    Kubota Yoshiki, Takata Masaki, Kitaura Ryo, Matsuda Ryotaro, Kitagawa Susumu, Chang Ho Chol, Kobayashi Tatsuo C., Sakata Makoto

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   782 - 782   2003.3

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  • Molecular oxygen ladder IV : Raman scattering of adsorbed oxygen

    Kobayashi T. C., Suzuki M., Mita Y., Kobayashi M., Kitaura R., Matsuda R., Chang H. C., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   783 - 783   2003.3

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  • Oxygen molecule ladder III : magnetism

    Kindo K., Matsuo A., Kobayashi T. C., Suzuki M., Matsuda R., Kitaura R., Chang H. C., Kitagawa S.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   782 - 782   2003.3

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  • Magnetic-Nonmagnetic Transition of UP_2

    Adachi T., Takeda K., Tanaka M., Shimizu K., Kobayashi T. C., Aoki D., Wisniewski P., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   568 - 568   2003.3

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  • Powder X-ray diffractions under low temperature and high pressure for pressure-induced superconductors in Ce compounds

    Takeda K., Adachi T., Kobayashi C., Shimizu K., Hidaka H., Takao D., Nishibori E., Takata M., Sakata M., Ohishi Y., Watanuki T., Shimomura O., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   565 - 565   2003.3

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  • Magnetic property of adsorbed O_2 in Cu complex

    Matsuo A., Suzuki M., Kitaura R., Chang H., Kitagawa S., Kobayashi T. C., Kindo K.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   442 - 442   2003.3

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  • de Haas-van Alphen effect in CeIn_3 under pressure

    Kubo T., Shishido H., Settai R., Kobayashi T. C., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   479 - 479   2003.3

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  • Superconductivity under high pressure

    K. Amaya, K. Shimizu, K. Takeda, N. Tateiwa, T. Muramatsu, M. Ishizuka, T. C. Kobayashi

    Physica B: Condensed Matter   329-333 ( II )   1308 - 1311   2003

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    DOI: 10.1016/S0921-4526(02)02136-1

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  • 大阪大学大学院基礎工学研究科・極限物性研究室の研究紹介

    小林 達生, 清水 克哉

    低温工学   37 ( 3 )   138 - 139   2002.3

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  • Magnetic-nonmagnetic transition of U3P4 at high pressures

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 7 )   197 - 200   2002

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  • NMR measurement of uranium dioxide UO_2 under high pressure

    Sakai H., Kato H., Tokunaga Y., Kambe S., Walstedt R.E., Nakamura A., Kobayashi C.

    Meeting Abstracts of the Physical Society of Japan   57 ( 0 )   372 - 372   2002

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    DOI: 10.11316/jpsgaiyo.57.2.3.0_372_4

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  • UGe2の強磁性と超伝導の共存

    小林達生, 芳賀芳範, 立岩尚之, 山上浩志, 摂待力生, 大貫惇睦

    固体物理   36 ( 11 )   43(803) - 48(808)   2001.11

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  • The resistivity of CeRhIn_5 under high pressure

    Muramatsu T., Tateiwa N., Kobayashi T. C., Shimizu K., Amaya K., Aoki D., Shishido H., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   507 - 507   2001.9

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  • Magnetic-non magnetic transition of U_3P_4 at high pressures

    Tanaka M., Takeda K., Kobayashi T. C., Shimizu K., Amaya K., Akazawa T., Inada Y., Wisniewski P., Aoki D., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   481 - 481   2001.9

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  • 18pYD-8 Magnetic-nonmagnetic Transition of UIr under Pressure

    Fujiwara Tabito, Hanazono Katsumi, Kobayashi Tatsuo C., Amaya Kiichi, Yamamoto Etsuji, Haga Yoshinori, Settai Rikio, Onuki Yoshichika

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   432 - 432   2001.9

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  • De Haas-van Alphen Effect in UGe_2 under Pressure

    Settai R., Nakashima M., Araki S., Shishido H., Nakawaki H., Haga Y., Yamamoto E., Onuki Y., Kobayashi T. C.

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   433 - 433   2001.9

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  • Thremal and magnetic properties of a pressure-induced superconductor UGe_2

    Tateiwa N., Kobayashi T. C., Amaya K., Inoue T., Kindo K., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   433 - 433   2001.9

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  • Physical Properties in CeCoIn_5 under pressure

    Nakawaki H., Shishido H., Hidaka H., Fujiwara T., Akazawa T., Kobayashi T., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   478 - 478   2001.9

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  • Pressure-induced Superconductivity in CeRhIn_5

    Muramatsu T., Tateiwa N., Kobayashi T. C., Shimizu K., Amaya K., Aoki D., Shishido H., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   547 - 547   2001.3

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  • Pressure-induced phase diagram of magnetism and superconductivity

    Kobayashi T. C., Tateiwa N., Muramatsu T., Hanazono K., Shimizu K., Amaya K., Inoue T., Kindo K., Aoki D., Shishido H., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   508 - 508   2001.3

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  • Electrical resistance mesurements under high pressure in UIr

    Kobayashi T. C., Fujiwara T., Hanazono K., Amaya K., Yamamoto E., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   503 - 503   2001.3

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  • Pressure-induced superconductivity in UGe_2 I : Electrical resistance and magnetisation measurements under high pressure

    Hanazono K., Kobayashi T. C., Amaya K., Inoue T., Kindo K., Uwatoko Y., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   447 - 447   2001.3

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  • Magnetic - non Magnetic transition of U_2P_4 at high pressures

    Takeda K., Tanaka M., Kobayashi T. C., Shimizu K., Amaya K., Inada Y., Wisneiewski P., Aoki D., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   503 - 503   2001.3

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  • Pressure induced superconductor UGe_2 II : Specific heat measurement under high pressure

    Tateiwa N., Kobayashi T. C., Amaya K., Haga Y., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   447 - 447   2001.3

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  • De Haas-van Alphen effect under pressure in CeRh_2Si_2 (II)

    Araki S., Nakashima M., Nakawaki H., Settai R., Kobayashi T. C., Harima H., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   493 - 493   2001.3

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  • Fermi surface instability in CeRh2Si2 under pressure

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 6 )   205 - 211   2001

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  • Specific Heat measurement on the low carrier concentration compound YbP

    Tateiwa N., Kobayashi T. C., Amaya K., Li D. X., Shiokawa Y., Suzuki T.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   438 - 438   2000.9

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  • Physical Properties in UGe_2 and UIr under pressure

    Settai R., Araki A., Aoki D., Yamamoto E., Haga Y., Kobayashi T. C., Amaya K., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   468 - 468   2000.9

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  • Specific heat measurement under high pressure on a pressure induced superconductor UGe_2

    Kobayashi T. C., Tateiwa N., Tsuji K., Amaya K., Haga Y., Yamamoto E., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   456 - 456   2000.9

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  • Pressure-induced superconductivity in UGe_2

    Hanazono K., Kobayashi T. C., Amaya K., Haga Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   509 - 509   2000.9

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  • Electrical resistance measurement of U_3P_4 and U_3As_4 at high pressure

    Takeda K., Tanaka M., Kobayashi T. C., Shimizu K., Amaya K., Inada Y., Wisniewski P., Aoki D., Murakawa M., Haga Y., Yamamoto E., Ohnuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   468 - 468   2000.9

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  • Magnetization measurements of Inorganic spin-Peierls material CuGeO_3 under high pressure

    Kitagawa H, Kindo K, Kobayashi T.C, Uwatoko Y, Nojiri H, Motokawa M, Akimitsu J

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   392 - 392   2000.3

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  • High-Field Magnetization of CeP under High-Pressure

    Inoue T., Kindo K., Haga Y., Suzuki T., Kobayashi T. C., Uwatoko Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   464 - 464   2000.3

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  • Pressure-induced Supersonductivity in CeIn_3

    Muramatsu T., Tateiwa N., Kobayashi T. C., Shimizu K., Amaya K., Araki S., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   432 - 432   2000.3

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  • High-Field Magnetization of URu_2Si_2 under High-Pressure

    Inoue T., Kindo K., Okuni H., Sugiyama K., Haga Y., Yamamoto e., Kobayashi T. C., Uwatoko Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   450 - 450   2000.3

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  • 27aH-4 Pressure-induced superconductivity in CeRh_2Si_2

    Hanazono K, Hashimoto K, Takimoto M, Muramatu T, Kobayashi T.C, Shimizu K, Amaya K, Araki S, Settai R, Onuki Y

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   568 - 568   1999.9

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  • 26pYQ-10 Elecrical resistance measurement of α-Mn under high pressure II

    Takeda K, Shimizu K, Kobayashi T, Amaya K, Ohnuki Y

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   408 - 408   1999.9

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  • 26aJ-1 Pressure dependense of quadruole ordering emperature Tq in CeB_6

    Hashimoto K, Kobayashi T.C, Eda S, Shimizu K, Amaya K, Onuki Y

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   540 - 540   1999.9

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  • 26aH-3 Electrical resistance of CeIn_3 under high pressure

    Muramatsu T, Kobayashi T.C, Shimizu K, Amaya K, Araki S, Onuki Y

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   537 - 537   1999.9

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  • 27aH-6 Temperature dependence of the metamagnetic transition in CeRh_2Si_2 under high magnetic fields and high pressures

    Hamamoto T, Kindo T, Kobayashi T.C, Uwatoko Y, Araki S, Settai R, Onuki Y

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   569 - 569   1999.9

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  • 29p-H-8 Electrical resistance of CeRh_2Si_2 under high pressure

    Takimoto M., Muramatu T., Kobayashi T.C., Shimizu K., Amaya K., Araki S., Settai R., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   433 - 433   1999.3

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  • 31a-E-11 Electrical Resistance Measurement of α-Mn under High Pressure

    Kusakabe T., Shimizu K., Kobayashi T.C., Amaya K., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   484 - 484   1999.3

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  • 31a-J-11 Magnetie propertios of oxygen molecules in micropores

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   493 - 493   1999.3

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  • 29p-H-13 Electrical resistance measurement of CeCu_6 under high pressure

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   434 - 434   1999.3

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  • DACを用いた重い電子系の高圧下電気抵抗測定

    小林 達生, 江田 成男, 清水 克哉

    大阪大学極限科学研究センタ-報告書   ( 3 )   85 - 87   1999.3

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  • 少数キャリアCePの高圧強磁場下での磁化

    井上 鉄太郎, 金道 浩一, 小林 達生

    大阪大学極限科学研究センタ-報告書   ( 4 )   70 - 77   1999

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  • CuGeO3の高圧下パルス強磁場磁化測定

    北川 広基, 金道 浩一, 小林 達生

    大阪大学極限科学研究センタ-報告書   ( 4 )   65 - 69   1999

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  • High Field Magnetlzation Measurements of CeRh_2Si_2 under High Pressures

    HAMAMOTO T., KINDO K., MURAMATSU T., KOBAYASHI T., UWATOKO Y., ARAKI S., SETTAI R., ONUKI Y.

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   541 - 541   1998.9

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  • Coexistence of double gaps in (VO)_2P_2O_7

    YAMAUCHI T., UEDA Y., KIKUCHI J., MOTOYA K., NARUMI Y., KOBAYASHI T., KINDO K.

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   526 - 526   1998.9

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  • Magnetization and Magnetoresistance Measurements up to 60T at 70mK

    NARUMI Y., KINDO K., KOBAYASHI C.

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   531 - 531   1998.9

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  • Observation of Superconductivity in Solid Oxygen

    SHIMIZU K., IKUMO M., EREMETS M.I, KOBAYASHI T.C, AMAYA K.

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   306 - 306   1998.9

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  • Heat capacity of Haldane gap system NDMAZ under magnetic fields II

    KODA A., TAGUCHI S., KOBAYASHI T., AMAYA K., TATANI K., NARUMI Y., KINDO K., YAMASHITA M.

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   401 - 401   1998.3

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  • Application of gas membrane DAC to low temperature experiments

    TAKIMOTO M., SHIMIZU K., KOBAYASHI T.C, AMAYA K.

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   570 - 570   1998.3

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  • Pressure dependence of Tc in Pb

    MIZUTANI Takeshi, KOBAYASHI Tatsuya, SHIMIZU Katsuya, AMAYA Kiichi, EREMETS M.I

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   586 - 586   1998.3

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  • High Field Magnetization in (VO)_2P_2O_7 and VO(HPO_4)0.5H_2O

    TATANI K., NARUMI Y., KINDO K., KOBAYASHI T.C, YAMAUCHI T., UEDA Y.

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   416 - 416   1998.3

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  • Electrical Resistance of CeB_6under high pressure

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   474 - 474   1998.3

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  • 超高圧・極低温下でのマイスナ-効果の測定

    水谷 剛, 小林 達生, 清水 克哉

    大阪大学極限科学研究センタ-報告書   ( 2 )   103 - 105   1998.3

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  • Magnetic-to-nonmagnetic transition in the ferromagnetic heavy-fermion compound CeRu2Ge2 at high pressures

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 2 )   553 - 556   1998.3

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  • 5p-D-14 Electric resistance measurement of metallic hydrogen

    Ikumo M., Shimizu K., Eremets M.I., Kobayashi T.C., Amaya K.

    Meeting abstracts of the Physical Society of Japan   52 ( 2 )   274 - 274   1997.9

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  • 6a-YK-14 The High Field Metamagnetic Transition of HoNi_2B_2C

    M. Abliz, Kindo K., Settai R., Kadowaki K., Takeya H., Muramatsu T., Kobayashi T.

    Meeting abstracts of the Physical Society of Japan   52 ( 2 )   474 - 474   1997.9

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  • 8a-YF-1 Magnetic susceptibility and electrical resistance of CeRh_2Si_2 under high pressure

    Muramatu T., Eda S., Kobayashi T.C., M.I. Eremets, Amaya K., Misawa A., Settai R., Yamamoto E., Haga K., Honma T., Ohnuki Y., Kawasaki H., Ishida K., Kitaoka Y., Asayama K.

    Meeting abstracts of the Physical Society of Japan   52 ( 2 )   536 - 536   1997.9

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  • 30p-P-5 Heat Capacities of UPt_3 under pressures and fields III

    Koda Akihiro, Kobayashi Tatsuo C., Amaya Kiichi, Kimura Noriaki, Onuki Yoshichika

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   492 - 492   1997.3

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  • 31p-P-13 Single Crystal Growth and the Metamagnetism in CeRh_2Si_2

    Settai R., Misawa R., Araki S., Haga Y., Yamamoto E., 0nuki Y., Takeuchi T., Kobayashi T., Amaya K.

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   516 - 516   1997.3

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  • 31a-L-1 Electrical Resistanse Measurements of α-Mn under High Pressure

    Kobayashi T.C., Saitoh M., Shimizu K., Amaya K.

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   498 - 498   1997.3

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  • 30p-P-3 Pressure effect on Tc of CeCu_2Ge_2

    Miyazu T., Kobayashi T.C., Shimizu K., Amaya K., Kitaoka Y., Onuki Y.

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   492 - 492   1997.3

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  • 28a-N-6 Heat Capacity and Magnetization Process of S=1/2 2D triangu1ar lattice LiNi0_2

    Yamakage H., Muramatsu T., Amaya K., Kitaoka Y., Kobayashi T.C., Narumi Y., Kindo K., Takano M., Kannno R.

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   399 - 399   1997.3

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  • 28a-PS-112 Magnetic properties oxygen molecules in one-dimensional micropores

    Kurobe J., Kobayashi T.C., Amaya K., Narumi Y., Kindo K., Terasaki O.

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   431 - 431   1997.3

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  • Heat Capacities of UPt_3 under High Pressures and Magnetic Fields II

    Koda A., Kobayashi T.C., Amaya K., Kimura N., Onuki Y.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1996 ( 3 )   51 - 51   1996.9

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  • Pressure effect on the electrical resistivity in spin ladder compounds

    Miyazu T., Kobayashi T.C., Shimizu K., Amaya K., Kitaoka Y., Kobayashi N., Hiroi Z., Takano M.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1996 ( 3 )   509 - 509   1996.9

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  • Pressure effect on the electrical resistivity in CeRu_2Ge_2

    Miyazu T., Kobayashi T.C., Yamakage H., Muramatu T., Shimizu K., Amaya K., Kitaoka Y., Onuki Y

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1996 ( 3 )   213 - 213   1996.9

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  • NMR Study of CeM_2Si_2(M=Pd, Rh)

    Kawasaki Y., Ishida K., Kitaoka Y., Asayama K., Kurobe J., Takeshita N., Shimizu K., Kobayashi T., Amaya K.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1996 ( 3 )   214 - 214   1996.9

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  • Observation of superconductivity of calcium under high pressures

    S Okada, K Shimizu, TC Kobayashi, K Amaya, S Endo

    CZECHOSLOVAK JOURNAL OF PHYSICS   46   869 - 870   1996

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  • Superconductivity of Calcium under High Pressures

    Report,Research Center for Materials Science at Extreme Conditions,Osaka University   ( 1 )   377 - 379   1996

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  • Magnetic properties of oxygen molecules in one-dimensional micropores

    Kurobe J, Katori H, Goto T, Miura N, Kobayashi T.C, Amaya K, Nakayama K, Mori W, Yamaguchi K, Kindo K, Kumada T, Narumi Y

    Meeting Abstracts of the Physical Society of Japan   1996 ( 0 )   197 - 197   1996

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    Language:Japanese   Publisher:一般社団法人 日本物理学会  

    DOI: 10.11316/jpsgaiyoj.1996.3.0_197_1

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  • Pressure effects on T_C of CeCu_2Ge_2II

    Takeshita N., Miyazu T., Shimizu K., Kobayashi T.C., Ishizuka M., Amaya K., Kitaoka Y., Asayama K., Onuki Y., Endo S.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1995 ( 3 )   4 - 4   1995.9

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  • Magnetic properties of oxygen molecules in one-dimensional micropore.

    黒部淳司, 小林達生, 天谷喜一, 森和亮, 山口兆, 金道浩一, 熊田高之, 香取浩子, 後藤恒之

    日本物理学会講演概要集(分科会)   1995 ( Autumn Pt 3 )   192 - 192   1995.9

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    DOI: 10.11316/jpsgaiyoj.1995.3.0_192_2

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  • Heat capacity of heavy fermion antiferromagnetic superconductor under magnetic field

    Koda A., Honda H., Kobayashi T.C., Amaya K., Kitaoka Y., Asayama K., Geibel C., Steglich F.

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting   50 ( 3 )   5 - 5   1995.3

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  • Pressuree efects on Tcof CeCu_2Ge_2

    Takeshita N., Miyazu T., Shimizu K., Kobayashi T.C., Amaya K., Kitaoka Y., Asayama K., Onuki Y., Endo S.

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting   50 ( 3 )   136 - 136   1995.3

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  • 2p-Z-8 Pressure effects on elecrical resistance of CeCu_2Ge_2

    Takeshita N, Kobayashi T, Shimizu K, Haga J, Amaya K, Kitaoka Y, Asayama K, Onuki Y, Endo S

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1994 ( 3 )   17 - 17   1994.8

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  • 30p-YN-8 The Magnetic Phase Diagram of Heavy Fermion Superconductor CeCu_2Si_2

    Kamino T, Kitaoka Y, Asayama K, Koda A, kobayashi T, Amano K, Steglich F

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting   49 ( 3 )   118 - 118   1994.3

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  • 6p-ZE-9 強結合超伝導体V_2HfのNMR

    柴田 直也, 岸本 豊, 北岡 良雄, 朝山 邦輔, 小林 達生

    秋の分科会講演予稿集   1989 ( 3 )   387 - 387   1989.9

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  • 139La NQR Study of Electronic States in Metallic Compounds(La1-xSrx)2CuO4

    Kobayashi Tatuo, Wada Shinji, Kitaoka Yoshio, Asayama Kunisuke, Amaya Kiichi

    Journal of the Physical Society of Japan   58 ( 3 )   p779 - 782   1989.3

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    We measured the temperature dependence of the nuclear spin-lattice relaxationtime T. of "'La in metallic compounds (La. .Sr.).Cu0. with .X'=0.045, 0.075, 0.10(high-7'. superconductors) and .X'=0.15 (nonsuper'conductor) by NQR experimenta-lion. T. for .X'=0.l5 was found to conform to the Korringa relation (7'.7'=const.)sufficiently, while the T, for ,v=0.075 and 0.10 in the normal state showed slightlystronger temperature dependence and were shorter than that for ,v=0.l5, in spite ofthe increase of hole concentration with increasing x. Fluctua1.ions of Cu d-spins areconsidered to play an important role for T. in superconducting compounds. The relax-ation behavior in the compound with ,v=0.045 is also discussed.

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  • 4p-E4-11 La_2CuO_4関連化合物の^<139>La NMR

    小林 達生, 和田 信二, 天谷 喜一, 岡本 匡史, 北岡 良雄, 朝山 邦輔

    秋の分科会講演予稿集   1988 ( 3 )   152 - 152   1988.9

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Presentations

  • MOFに吸着した酸素分子の磁性 Invited

    小林達生

    物性研短期研究会/強磁場科学研究会 高圧下強磁場複合極限科学の最前線  2025.11.26 

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    Event date: 2025.11.25 - 2025.11.27

    Language:Japanese  

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  • Cd2Re2O7の応力によるドメイン制御

    小林達生

    学術変革領域研究(A)「アシンメトリが彩る量子物質の可視化・設計・創出」トピカルミーティング  2023.8.31 

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    Event date: 2023.8.30 - 2023.8.31

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • アシンメトリ量子物質の高圧極低温物性

    小林達生

    学術変革領域研究(A) 「アシンメトリが彩る量子物質の可視化・設計・創出」 キックオフミーティング  2023.6.10 

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    Event date: 2023.6.10 - 2023.6.11

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • α-Mnの高圧物性

    小林達生, 荒木新吾, 秋葉和人, 西森弘顕, 岩本凱成

    ウラン化合物を中心とする特異な物性の最前線  2022.4.26 

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    Event date: 2022.4.25 - 2022.4.26

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • α-Mnの高圧物性

    小林達生, 荒木新吾, 秋葉和人, 西森弘顕, 岩本凱成

    日本物理学会第77回年次大会  2022.3.16 

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    Event date: 2022.3.15 - 2022.3.19

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • α-Mnの高圧物性

    小林達生

    JPhysics+イン淡路  2020.12.4 

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    Event date: 2020.12.3 - 2020.12.5

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Quantum Transport Properties on Chemically Etched (0001) Surface of Tellurium International conference

    K. Akiba, S. Asada, K. Kobayashi, T. C. Kobayashi, R. Koezuka, M. Tokunaga

    International Conference on Strongly Correlated Electron Systems 2019 (SCES2019)  2019.9 

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    Event date: 2019.9.23 - 2019.9.28

    Language:English   Presentation type:Poster presentation  

    Venue:Okayama Convention Center  

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  • Pressure-Temperature Phase Diagram of alpha-Mn International conference

    T. Sato, K. Akiba, S. Araki, T. C. Kobayashi

    International Conference on Strongly Correlated Electron Systems 2019 (SCES2019)  2019.9 

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    Event date: 2019.9.23 - 2019.9.28

    Language:English   Presentation type:Poster presentation  

    Venue:Okayama Convention Center  

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  • Fluctuation Effect of the Parity-Breaking Order in the Hall Effect of Cd2Re2O7 International conference

    T. C. Kobayashi, Y. Ikeyama, R. Mitsui, K. Akiba, S. Araki, J. Yamaura, Y. Matsubayashi, Z. Hiroi

    International Conference on Strongly Correlated Electron Systems 2019 (SCES2019)  2019.9 

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    Event date: 2019.9.23 - 2019.9.28

    Language:English   Presentation type:Poster presentation  

    Venue:Okayama Convention Center  

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  • Magnetism of Alkali Superoxide NaO2 under Pressure International conference

    M. Miyajima, F. Astuti, T. Fukuda, M. Kodani, T. Nakano, A. Matsuo, K. Kindo, I. Watanabe, T. C. Kobayashi, T. Kambe

    International Conference on Strongly Correlated Electron Systems 2019 (SCES2019)  2019.9 

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    Event date: 2019.9.23 - 2019.9.28

    Language:English   Presentation type:Poster presentation  

    Venue:Okayama Convention Center  

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  • Antiferromagnetic quantum criticality in CeRh2Si2 International coauthorship International conference

    S. Araki, R. Mitsui, T. C. Kobayashi, W. Imai, M. Miyazaki, R. Settai, D. Braithwaite, D. Aoki

    International Conference on Strongly Correlated Electron Systems 2019 (SCES2019)  2019.9 

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    Event date: 2019.9.23 - 2019.9.28

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Okayama Convention Center  

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  • Hall effect in Cd2Re2O7 under high pressure

    J-Physics 2019 International Conference  2019.9 

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    Event date: 2019.9.18 - 2019.9.21

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  • Cd2Re2O7における高圧下ホール効果

    小林達生, 池山由十, 三井理功, 秋葉和人, 荒木新吾, 山浦淳一, 松林康仁, 廣井善二

    日本物理学会2019年秋季大会  2019.9 

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    Event date: 2019.9.10 - 2019.9.13

    Language:Japanese  

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  • Cd2Re2O7のホール効果

    小林達生

    J-Physics地域研究会 - 北九州  2019.6 

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    Event date: 2019.6.7 - 2019.6.8

    Language:Japanese  

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  • Cd2Re2O7の高圧物性

    小林達生

    第1回ETQ研究会  2018.8 

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    Event date: 2018.8.8 - 2018.8.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Cd2Re2O7の高圧下における奇パリティ多極子秩序とパリティゆらぎ超伝導

    小林達生

    J-Physics:多極子伝導系の物理 平成30年度領域全体会議  2018.5 

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    Event date: 2018.5.24 - 2018.5.26

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  • Cd2Re2O7における圧力 温度相図とホール効果の圧力効果

    小林達生, 三井理功, 安部大貴, 荒木新吾, 町田洋, 井澤公一, 山浦淳一, 松林康仁, 広井善二

    日本物理学会第73回年次大会  2018.3 

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    Event date: 2018.3.22 - 2018.3.25

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  • Hall effect in Cd2Re2O7 under high pressure

    T. C. Kobayashi, R. Mitsui, S. Araki, J. Yamaura, Y. Matsubayashi, Z. Hiroi

    J-Physics Annual Meeting FY2017  2018.3 

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    Event date: 2018.3.15 - 2018.3.17

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  • Superconductivity in Cd2Re2O7 under high pressure International conference

    T. C. Kobayashi

    Meeting on physics and chemistry of emerging superconductors and thermoelectric materials  2017.9 

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    Event date: 2017.9.13 - 2017.9.15

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sapienza University  

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  • Cd2Re2O7の圧力-温度相図と超伝導

    小林達生, 安部大貴, 荒木新吾, 町田洋, 井澤公一, 山浦淳一, 松林康仁, 廣井善二

    日本物理学会第72回年次大会  2017.3 

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    Event date: 2017.3.17 - 2017.3.20

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Cd2Re2O7の圧力-温度相図

    小林達生, 安部大貴, 荒木新吾, 山浦淳一, 松林康仁, 広井善二

    日本物理学会2016年秋季大会  2016.9 

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    Event date: 2016.9.13 - 2016.9.16

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  • 固体酸素の磁場誘起相転移

    小林達生

    日本物理学会第70回年次大会  2015.3 

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    Event date: 2015.3.21 - 2015.3.24

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

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  • 静水圧性が向上して明らかになった相転移

    小林達生

    未来を拓く高圧力科学技術セミナーシリーズ(40)「良質高圧力に支えられた物理学」  2015.2.10 

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    Event date: 2015.2.10

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  • 酸素分子の分子間相互作用と磁場誘起構造相転移

    小林達生

    第1回九工大物性ワークショップ  2014.11 

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    Event date: 2014.11.21 - 2014.11.22

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Novel Phase of Solid Oxygen Induced by Ultrahigh Magnetic Fields International conference

    T. C. Kobayashi

    2014.11 

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    Event date: 2014.11.8 - 2014.11.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Hotel Limani (Okayama)  

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  • Emergence of ferromagnetic oxygen in ultrahigh magnetic field International conference

    T. C. Kobayashi, T. Nomura, Y. H. Matsuda, J. L. Her, S. Takeyama, A. Matsuo, K. Kindo

    27th International Conference on Low Temperature Physics  2014.8 

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    Event date: 2014.8.6 - 2014.8.13

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Palais Rouge, Buenos Aires  

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  • 酸素分子間の磁気的相互作用と分子配列

    小林達生

    日本物理学会2013年秋季大会  2013.9 

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    Event date: 2013.9.25 - 2013.9.28

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

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  • 価数クロスオーバーと異常金属:CeCu2Si2の圧力効果

    小林達生

    日本物理学会2013年秋季大会  2013.9 

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    Event date: 2013.9.25 - 2013.9.28

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  • Pressure-induced magnetic transition and disappearance of superconductivity in CeNiGe3

    T. C. Kobayashi, Y. Ikeda, T. Tomijima, S. Araki, K. Murata

    SCES2013  2013.8 

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    Event date: 2013.8.5 - 2013.8.9

    Language:English   Presentation type:Poster presentation  

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  • 固体酸素の磁場誘起構造相転移

    小林達生

    パイロクロアワークショップ「高対称性格子上の変幻自在電子」  2013 

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    Event date: 2013.7.5 - 2013.7.7

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Localized to itinerant crossover of 4f electrons in CeCu2Si2 under high pressure Invited International coauthorship International conference

    T. C. Kobayashi

    SMEC2013  2013.3 

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    Event date: 2013.3.23 - 2013.3.30

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Miami & East Caribbean  

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  • AxV2Al20 (A = Ga, Al) におけるラットリングと超伝導の圧力効果

    小林達生

    第3回パイロクロア研究会  2012.12 

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    Event date: 2012.12.25 - 2012.12.27

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • AxV2Al20 (A = Ga, Al) におけるラットリングと超伝導の圧力効果

    小林達生

    新学術領域研究「重い電子系の形成と秩序化」ワークショップ ~カゴ状構造に宿る強相関物性~  2012.9 

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    Event date: 2012.9.26 - 2012.9.28

    Language:Japanese  

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  • Spin-dependent molecular arrangement of O2-O2 dimer in nanoporous metal-organic solids International conference

    T. C. Kobayashi, A. Hori, Y. Kubota, A. Matsuo, K. Kindo, J. Kim, K. Kato, M. Takata, H. Sakamoto, R. Matsuda, S. Kitagawa

    ICM19  2012.7 

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    Event date: 2012.7.8 - 2012.7.13

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Busan  

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  • Arrangement and magnetism of O2-O2 dimer adsorbed in microporous coordination polymers Invited International conference

    T. C. Kobayashi

    The 11th Tamura Memorial Symposium -Frontiers in Nanoscience-  2011.12 

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    Event date: 2011.12.3 - 2011.12.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Osaka Prefecture University  

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  • Pressure-induced Structural Phase Transitions in UIr

    T. C. Kobayashi, H. Kotegawa, S. Araki, T. Akazawa, A. Hori, Y. Irie, S. Fukushima, H. Hidaka, K. Takeda, Y. Ohishi, K. Murata, E. Yamamoto, S. Ikeda, Y. Haga, Y. Onuki

    TOKIMEKI 2011, International workshop on heavy fermions  2011.11 

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    Event date: 2011.11.23 - 2011.11.26

    Language:Japanese  

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  • Cd2Re2O7の圧力誘起相図と超伝導

    小林達生, 入江祐太, 山浦淳一, 廣井善二, 村田恵三

    日本物理学会2011年秋季大会  2011.9 

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    Event date: 2011.9.21 - 2011.9.24

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Heat capacity of SmOs4Sb12 under high pressure International conference

    T. C. Kobayashi, K. Miyazawa, Y. Ikeda, S. Araki, H. Kotegawa, H. Sugawara, D. Kikuchi, H. Sato

    From Blue Pigment to Green Energy - Cobalt mines - Skutterudites - Thermoelectrics-  2011.9 

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    Event date: 2011.9.5 - 2011.9.8

    Language:English   Presentation type:Poster presentation  

    Venue:Vikersund  

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  • Hall effect in single crystal CeCu2Si2 under high pressure International conference

    S. Araki, Y. Shiroyama, T. Shinohara, Y. Ikeda, T. C. Kobayashi, S. Seiro, C. Geibel, F. Steglich

    SCES2011  2011.8 

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    Event date: 2011.8.29 - 2011.9.3

    Language:English   Presentation type:Poster presentation  

    Venue:Cambridge  

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  • Cd2Re2O7における高圧下で誘起される重い電子の超伝導

    小林達生, 入江祐太, 山浦淳一, 廣井善二, 村田惠三

    日本物理学会第66回年次大会  2011.3 

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    Event date: 2011.3.25 - 2011.3.28

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Cd2Re2O7の圧力―温度相図

    小林達生

    第2回パイロクロア研究会  2010.12 

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    Event date: 2010.12.25 - 2010.12.27

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Heat capacity measurement of SmOs4Sb12 under high pressure

    T.C. Kobayashi, Y. Kawasaki, K. Miyazawa, Y. Ikeda, S. Araki, H. Kotegawa, H. Sugawara, D. Kikuchi, H. Sato

    International Conference on Heavy Electrons 2010  2010.9 

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    Event date: 2010.9.17 - 2010.9.20

    Language:Japanese  

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  • 高圧下精密物性測定によるf 電子系化合物の量子相転移と超伝導の研究

    小林達生

    新学術領域研究「重い電子系の形成と秩序化」第2回研究会  2009.8 

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    Event date: 2009.8.18 - 2009.8.20

    Language:Japanese  

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  • 強磁性体U3P4 の圧力誘起強磁性-非磁性転移

    小林達生

    新学術領域研究「重い電子系の形成と秩序化」第1回研究会  2009.3 

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    Event date: 2009.3.9 - 2009.3.11

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • PrFe4P12の圧力誘起金属-絶縁体転移

    小林達生

    特定領域研究「充填スクッテルダイト構造に創出する新しい量子多電子状態」第6回研究会  2008.7 

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    Event date: 2008.7.11 - 2008.7.13

    Language:Japanese  

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  • Magnetic properties of molecular oxygen adsorbed in the coordination space International conference

    T. C. Kobayashi

    Third International Symposium on Chemistry of Coordination Space -ISCCS 2007-  2007.12 

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    Event date: 2007.12.9 - 2007.12.12

    Language:English   Presentation type:Poster presentation  

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  • UIrの圧力誘起相と超伝導

    小林達生

    超伝導が拓く物性科学の最前線4 特定領域合同研究会  2007.12 

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    Event date: 2007.12.7 - 2007.12.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • ミクロ孔をもつ配位高分子に吸着した酸素分子の磁性

    小林達生, 堀彰宏, 山口毅典, 松尾晶, 金道浩一, 久保田佳基, 高田昌樹, 北川進

    日本物理学会第62回年次大会  2007.9 

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    Event date: 2007.9.21 - 2007.9.24

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 配位空間に吸着した酸素分子の磁性

    小林達生

    特定領域「配位空間の化学」平成19年度全体会議  2007.5 

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    Event date: 2007.5.22 - 2007.5.23

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 配位空間に吸着した酸素分子の磁性

    小林達生

    特定領域「配位空間の化学」第三回公開講演会・成果報告会  2007.1 

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    Event date: 2007.1.12 - 2007.1.13

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Magnetic properties of molecular oxygen adsorbed in the coordination space

    T. C. Kobayashi

    Second International Symposium on Chemistry of Coordination Space -ISCCS 2006-  2006.12 

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    Event date: 2006.12.15 - 2006.12.16

    Language:English  

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  • 強磁性体UIrの圧力下の超伝導

    小林達生

    日本物理学会2006年秋季大会  2006.9 

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    Event date: 2006.9.23 - 2006.9.26

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

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  • Pressure-temperature phase diagram of UIr Invited

    T. C. Kobayashi

    Novel pressure-induced phenomena in condensed matter systems  2006.8.26 

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    Event date: 2006.8.26 - 2006.8.29

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • 配位空間に吸着した酸素分子の磁性

    小林達生

    特定領域「配位空間の化学」平成18年度全体会議  2006.6 

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    Event date: 2006.6.23 - 2006.6.24

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 配位空間に吸着した酸素分子の異常磁性の解明

    小林達生

    特定領域「配位空間の化学」第2回公開講演会・成果報告会  2006.1 

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    Event date: 2006.1.27 - 2006.1.28

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  • Anisotropic residual resistivity under high pressure in UIr

    T. C. Kobayashi, A. Hori, H. Hidaka, H. Kotegawa, T. Akazawa, S. Ikeda, E. Yamamoto, Y. Haga, R. Settai, Y. Onuki

    The 5th International Symposium on Advanced Science Research in Celebration of the World Year of Physics 2005 -Advances in the Physics and Chemistry of Actinide Compounds-  2005.9 

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    Event date: 2005.9.27 - 2005.9.29

    Language:English  

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  • 一次元細孔内酸素分子ダイマーの異常磁性

    小林達生

    日本物理学会2005年秋季大会  2005.9 

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    Event date: 2005.9.19 - 2005.9.22

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

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  • Pressure-induced superconductivity in ferromagnet UIr without inversion symmetry Invited

    T. C. Kobayashi

    International Conference on Strongly Correlated Electron systems (SCES’05)  2005.7 

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    Event date: 2005.7.26 - 2005.7.30

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • Pressure induced superconductivity in UIr and CeNiGe3 Invited International conference

    T. C. Kobayashi

    International Workshop on Materials Science and Nano-Engineering  2004.12 

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    Event date: 2004.12.11 - 2004.12.14

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Osaka  

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  • Magnetic properties of molecular oxygen adsorbed in micro-porous metal-organic solids Invited International conference

    T. C. Kobayashi

    International Conference on Quantum Spin Systems (QSS04)  2004.11 

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    Event date: 2004.11.30 - 2004.12.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Hayama, Kanagawa  

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  • Pressure induced superconductivity in UIr and CeNiGe3 Invited International conference

    T. C. Kobayashi

    Japan-French Colloquium “Quantum complex systems”  2004.7 

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    Event date: 2004.7.21 - 2004.7.24

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Grenoble  

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  • CeCu2Ge2の低温における体積の圧力依存性

    日本物理学会第60回年次大会  2005 

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  • 反転対称性を持たない強磁性超伝導体UIrの交流帯磁率測定II

    日本物理学会第60回年次大会  2005 

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  • 高圧下におけるUIrの電気伝導の異方性

    日本物理学会第60回年次大会  2005 

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  • CeCu2Si2の高圧下におけるCu-NQR III

    日本物理学会第60回年次大会  2005 

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  • 配位空間に吸着した酸素分子の磁性

    特定領域「配位空間の化学」平成17年度第一回全体会議  2005 

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  • PrFe4P12の圧力誘起絶縁体状態におけるホール効果

    日本物理学会第60回年次大会  2005 

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  • PrFe4P12の圧力誘起絶縁体状態における31P-NMR

    日本物理学会第60回年次大会  2005 

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  • URu2Si2の高圧下極低温磁化測定IV

    日本物理学会第60回年次大会  2005 

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  • 多孔性配位高分子に吸着した水素分子の直接観測

    日本物理学会第60回年次大会  2005 

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  • 配位空間に吸着した酸素分子の磁性

    特定領域「配位空間の化学」平成16年度成果報告会  2005 

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  • UIrの高圧下での構造解析

    日本物理学会第60回年次大会  2005 

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  • ナノ細孔中に閉じ込められた酸素分子鎖の強磁場磁化

    日本物理学会2005年秋季大会  2005 

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  • RAgSb2(R=Ce,La)の電気伝導の異常とフェルミ面の研究

    日本物理学会2005年秋季大会  2005 

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  • PrFe4P12における圧力誘起絶縁相の研究

    日本物理学会2005年秋季大会  2005 

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  • CeCu2Si2の高圧下Cu-NQRの研究

    日本物理学会2005年秋季大会  2005 

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  • 73Ge-NQRによるCeNi2Ge2の研究

    日本物理学会2005年秋季大会  2005 

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  • CeNiGe3の反強磁性状態における超伝導

    日本物理学会2005年秋季大会  2005 

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  • UIrにおける交流帯磁率測定から見た強磁性と超伝導の共存

    日本物理学会2005年秋季大会  2005 

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  • Yb系化合物YbPd2Si2とYbCu5の圧力効果

    日本物理学会2005年秋季大会  2005 

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  • UIrにおける多重強磁性相の異方的電気伝導

    日本物理学会2005年秋季大会  2005 

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  • CeNiGe3の圧力誘起超伝導

    日本物理学会第60回年次大会  2005 

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  • 配位空間に吸着した酸素分子の磁性

    特定領域「配位空間の化学」A01班会議  2005 

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  • YbXCu4 (X = In, Cu) の高圧物性の研究

    日本物理学会2005年秋季大会  2005 

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  • Pressure-induced charge ordering of LiV2O4

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • Pressure-induced metal-insulator transition in the filled skutterudite PrFe4P12

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • 充填スクッテルダイトPrFe4P12の圧力誘起金属絶縁体転移

    日本物理学会 第59回年次大会  2004 

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  • High-pressure effect on the electrical resistivity in CeNiGe3 and CeNi2Al5

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • de Haas-van Alphen effect in CeIn3 under pressure

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • Pressure-induced superconductivity in UIr without inversion symmetry

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • スピン多面体Mo72Fe30の1/3磁化異常:非平衡性の検証

    日本物理学会 2004年秋季大会  2004 

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  • ナノ空間に閉じ込められた酸素の強磁場磁化

    日本物理学会 2004年秋季大会  2004 

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  • CeCu2Si2の高圧下におけるCu-NQR

    日本物理学会 2004年秋季大会  2004 

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  • 反転対称性を持たない強磁性超伝導体UIrの交流帯磁率測定

    日本物理学会 2004年秋季大会  2004 

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  • 充填スクッテルダイトPrFe4P12の圧力誘起金属絶縁体転移II

    日本物理学会 2004年秋季大会  2004 

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  • SmOs4Sb12の圧力効果

    日本物理学会 2004年秋季大会  2004 

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  • 反転対称をもたないUIrにおける強磁性量子臨界点近傍の超伝導

    日本物理学会 2004年秋季大会  2004 

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  • 遍歴強磁性体UIrの高圧下磁化測定II

    日本物理学会 2004年秋季大会  2004 

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  • CeCu2Si2の高圧下におけるCu-NQR

    日本物理学会 第59回年次大会  2004 

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  • 遍歴強磁性体UIrの圧力下磁化測定

    日本物理学会 第59回年次大会  2004 

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  • 反転対称性を持たない強磁性体UIrの圧力誘起超伝導

    日本物理学会 第59回年次大会  2004 

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  • NQR study of CeCu2Si2 up to 5 GPa

    The International Conference on Strongly Correlated Electron Systems  2004 

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  • CeNiGe3の圧力-温度相図

    日本物理学会 第59回年次大会  2004 

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  • 細孔をもつ銅錯体に吸着させた酸素の磁性

    日本物理学会 第59回年次大会  2004 

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  • Magnetism of a one-dimensional array of oxygen in a micro-porous metal-organic solid International conference

    T. C. Kobayashi, M. Suzuki, A. Matsuo, K. Kindo, R. Kitaura, R. Matsuda, H-C. Chang, S. Kitagawa

    International Conference on Magnetism (ICM 2003)  2003.7 

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Roma  

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  • 酸素分子ラダーⅡ-電子密度解析による吸着分子の直接観察-

    日本物理学会第58回年次大会  2003 

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  • CeNi2Al5とCeNiGe3の圧力下電気抵抗

    日本物理学会2003年秋季大会  2003 

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  • CeRhGeの加圧下抵抗異常

    日本物理学会2003年秋季大会  2003 

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  • LiV2O4の圧力誘起電荷整列II

    日本物理学会2003年秋季大会  2003 

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  • ウラン酸化物UO2における高圧下NMR測定III

    日本物理学会2003年秋季大会  2003 

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  • URu2Si2の高圧下極低温磁化測定Ⅱ

    日本物理学会2003年秋季大会  2003 

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  • 圧力誘起超伝導体UGe2の加圧下のdHvA効果III

    日本物理学会2003年秋季大会  2003 

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  • 細孔をもつ銅錯体に吸着させた酸素分子の磁性

    日本物理学会2003年秋季大会  2003 

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  • 圧力下でのUIrの磁気相図

    日本物理学会2003年秋季大会  2003 

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  • CePtGe2,Ce3RhGa10の高圧下での電気抵抗

    日本物理学会2003年秋季大会  2003 

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  • UP2の磁性-非磁性転移

    日本物理学会第58回年次大会  2003 

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  • Magnetism of uranium dioxide UO2 under high pressure

    International Conference on Magnetism (ICM 2003)  2003 

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  • A change of the Fermi surface in CeIn3 across the critical pressure

    International Conference on Magnetism (ICM 2003)  2003 

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  • PrFe4P12の圧力下電気抵抗率測定

    日本物理学会2003年秋季大会  2003 

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  • PrFe4P12の高圧下磁化測定

    日本物理学会2003年秋季大会  2003 

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  • 遍歴強磁性体UIrの高圧下磁化測定

    日本物理学会第58回年次大会  2003 

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  • YbInCu4の圧力誘起磁気秩序

    日本物理学会第58回年次大会  2003 

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  • Evidence for the pressure-induced magnetic ordering in YbInCu4

    International Conference on Magnetism (ICM 2003)  2003 

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  • Ce系圧力誘起超伝導体の低温高圧下粉末X線回折

    日本物理学会第58回年次大会  2003 

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  • URu2Si2の高圧下極低温磁化測定

    日本物理学会第58回年次大会  2003 

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  • 酸素分子ラダーⅢ-磁性

    日本物理学会第58回年次大会  2003 

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  • 酸素分子ラダーⅣ-吸着酸素分子のラマン散乱-

    日本物理学会第58回年次大会  2003 

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  • ウラン酸化物UO2における高圧下NMR測定II

    日本物理学会第58回年次大会  2003 

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  • 銅錯体に吸着させた酸素分子の磁気的性質

    日本物理学会第58回年次大会  2003 

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  • CeIn3の加圧下dHvA効果

    日本物理学会第58回年次大会  2003 

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  • 酸素分子ラダーI-ボトムアップ構築のための集積型細孔銅錯体の合成と酸素吸着-

    日本物理学会第58回年次大会  2003 

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  • 高圧下におけるUIrの磁性-非磁性転移

    日本物理学会第57回年次大会  2002 

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  • CeAgSb2の量子臨界点近傍での電気抵抗

    日本物理学会2002年秋季大会  2002 

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  • Heat capacity of the Ferromagnetic Superconductor UGe2

    International Conference on Strongly Correlated Electron Systems  2002 

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  • Superconductivity in CeRh2Si2 under pressure

    International Conference on Strongly Correlated Electron Systems  2002 

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  • de Haas-van Alphen experiments in the quantum critical region of cerium and uranium compounds

    International Conference on Strongly Correlated Electron Systems  2002 

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  • 高圧下におけるLiV2O4のスピンダイナミクス

    日本物理学会第57回年次大会  2002 

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  • 圧力下でのU3P4の強磁性―常磁性転移

    日本物理学会第57回年次大会  2002 

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  • 圧力誘起超伝導物質UGe2の高圧下比熱測定

    日本物理学会第57回年次大会  2002 

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  • 圧力誘起超伝導体UGe2の加圧下のdHvA効果II

    日本物理学会第57回年次大会  2002 

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  • α-Mnの磁性-非磁性転移

    日本物理学会第57回年次大会  2002 

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  • 高圧下におけるCeTIn5(T=Rh,Ir)の電気抵抗

    日本物理学会第57回年次大会  2002 

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  • CeMg2Cu9の圧力下での電気抵抗

    日本物理学会第57回年次大会  2002 

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  • LiV2O4の圧力誘起電荷整列

    日本物理学会第57回年次大会  2002 

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  • CeRh2Si2の圧力誘起超伝導

    日本物理学会第57回年次大会  2002 

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  • Specific heat of an S = 1 quasi-1D bond alternating antiferromagnet in a magnetic field

    The 23rd International Conference on Low Temperature Physics  2002 

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  • S=1反強磁性ボンド交替鎖における磁場誘起長距離秩序の観測II

    日本物理学会2002年秋季大会  2002 

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  • 金属絶縁体転移物質BaVS3の高圧下電気抵抗測定

    日本物理学会2002年秋季大会  2002 

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  • ウラン酸化物UO2における高圧下NMR測定

    日本物理学会2002年秋季大会  2002 

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  • 強磁性超伝導物質UGe2の高圧下比熱測定-T *における比熱異常-

    日本物理学会2002年秋季大会  2002 

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  • Superconductivity under high pressure

    The 23rd International Conference on Low Temperature Physics  2002 

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  • A heat capacity anomaly of the superconducting transition in a ferromagnetic superconductor UGe2

    The 23rd International Conference on Low Temperature Physics  2002 

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  • Pressure-induced superconductivity in a ferromagnet UGe2

    International Conference on High Pressure Science and Technology (AIRAPT-18)  2001 

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  • CeRhIn5の圧力誘起超伝導

    日本物理学会第56回年次大会  2001 

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  • 磁性と超伝導の圧力誘起相図

    日本物理学会第56回年次大会  2001 

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  • UGe2の圧力誘起超伝導II-高圧下比熱測定

    日本物理学会第56回年次大会  2001 

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  • スピネル化合物LiV2O4の5GPa級Li-NMR測定

    日本物理学会第56回年次大会  2001 

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  • CeRh2Si2の圧力下でのdHvA効果II

    日本物理学会第56回年次大会  2001 

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  • 高圧下におけるU3P4の磁性―非磁性転移

    日本物理学会第56回年次大会  2001 

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  • Magnetic-nonmagnetic transition of U3P4 at high pressures

    Actinides-2001 International Conference  2001 

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  • 圧力誘起超伝導体UGe2の加圧下のdHvA効果

    日本物理学会2001年秋季大会  2001 

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  • 圧力誘起超伝導物質UGe2の高圧下比熱・磁化測定

    日本物理学会2001年秋季大会  2001 

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  • 高圧下におけるU3P4の磁性―非磁性転移II

    日本物理学会2001年秋季大会  2001 

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  • Thermal properties of a ferromagnetic superconductor UGe2

    Actinides-2001 International Conference  2001 

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  • Heat capacity of pressure-induced superconductivity in itinerant ferromagnet UGe2

    International Conference on Strongly Correlated Electron Systems (SCES 2001)  2001 

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  • Spin dynamics of heavy fermion system LiV2O4 under pressure

    International Conference on Strongly Correlated Electron Systems (SCES 2001)  2001 

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  • 高圧下におけるLiV2O4のLi-NMR

    日本物理学会2001年秋季大会  2001 

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  • 高圧下におけるUIrの磁性―非磁性転移

    日本物理学会2001年秋季大会  2001 

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  • Transport properties of CeRhIn5 under high pressures up to 8.5 GPa

    International Conference on Strongly Correlated Electron Systems (SCES 2001)  2001 

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  • UGe2の圧力誘起超伝導I-高圧下の電気抵抗・磁化測定

    日本物理学会第56回年次大会  2001 

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  • 高圧下におけるUIrの電気抵抗測定

    日本物理学会第56回年次大会  2001 

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  • YbPの極低温比熱測定

    日本物理学会第55回年次大会  2000 

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  • 低温高圧下におけるα-Mnの電気伝導と粉末X線回折

    高圧討論会  2000 

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  • ハルデン物質NDMAPのプロトンNMR

    日本物理学会第55回年次大会  2000 

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  • ウラン化合物UGe2,UIrの加圧下の物性

    日本物理学会第55回年次大会  2000 

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  • Pressure-induced superconductivity

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • Fermi surface instability in CeRh2Si2 and UGe2

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • 高圧下におけるU3P4とU3As4の電気抵抗測定

    日本物理学会第55回年次大会  2000 

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  • UGe2の圧力誘起超伝導

    日本物理学会第55回年次大会  2000 

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  • Pressure dependence of the transport properties in CeRhIn5

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • Resistance measurement in UGe2 under high pressure

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • Heat capacity of the pressure-induced superconductivity in itinerant ferromagnet UGe2

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • Electrical resistivity of U3P4 at high pressures

    International Symposium on New Developments in Strongly Correlated Electron Phase under Multiple Environment  2000 

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  • CeIn3の圧力誘起超伝導

    日本物理学会2000年春の分科会  2000 

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  • ハルデン系NDMAPのプロトンNMR

    日本物理学会2000年春の分科会  2000 

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  • NDMAZの磁場誘起長距離秩序

    日本物理学会2000年春の分科会  2000 

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  • CeAl2の電気抵抗の圧力依存性

    日本物理学会2000年春の分科会  2000 

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  • 圧力誘起超伝導物質UGe2の高圧下比熱測定

    日本物理学会第55回年次大会  2000 

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  • High-quality single crystal growth and a change of the electronic states under pressure in CeRh2Si2

    International Conference on Magnetism 2000 (ICM-2000)  2000 

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  • Proton NMR study of the field-induced long-range ordering in Haldane gap system NDMAP

    International Conference on Magnetism 2000 (ICM-2000)  2000 

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  • 二次元スピンギャップ系SrCu2(BO3)2の極低温・高磁場中比熱測定

    日本物理学会第55回年次大会  2000 

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  • a-Mnの圧力下電気抵抗測定

    日本物理学会第54回年会  1999 

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  • Pressure-dependence of superconducting behavior in CeRh2Si2

    International Conference on Strongly Correlated Electron System (SCES99)  1999 

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  • Metamagnetic transition of CeRh2Si2 under high fields and high pressures at various temperatures

    International Conference on Strongly Correlated Electron System (SCES99)  1999 

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  • α-Mnの圧力下電気抵抗測定Ⅱ

    日本物理学会1999年秋の分科会  1999 

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  • CeRh2Si2の圧力誘起超伝導

    日本物理学会1999年秋の分科会  1999 

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  • NDMAZの磁場誘起長距離秩序の比熱

    日本物理学会1999年秋の分科会  1999 

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  • ハルデン系NDMAPのプロトンNMR

    日本物理学会1999年秋の分科会  1999 

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  • 高圧下におけるCeIn3の電気抵抗

    日本物理学会1999年秋の分科会  1999 

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  • CeB6の四重極秩序の圧力効果

    日本物理学会1999年秋の分科会  1999 

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  • 高圧下でのCeRh2Si2の電気抵抗測定

    日本物理学会第54回年会  1999 

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  • 細孔中に吸着した酸素分子の磁性

    日本物理学会第54回年会  1999 

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  • Electrical Resistance Measurement in Hydrostatic Pressure up to 10 GPa using a Diamond Anvil Cell

    International Conference on High Pressure Science and Technology (AIRAPT-17)  1999 

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  • Electrical Studies in DAC

    International Conference on High Pressure Science and Technology (AIRAPT-17)  1999 

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  • CeCu6の圧力下における電気抵抗測定

    日本物理学会第54回年会  1999 

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  • CeIn3の圧力下比熱測定

    日本物理学会第54回年会  1999 

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  • 高圧下におけるCeIn3の交流帯磁率

    日本物理学会第54回年会  1999 

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  • Pressure dependence of quadrupole ordering temperature TQ in CeB6

    International Conference on Strongly Correlated Electron System (SCES99)  1999 

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  • α-Mnの圧力下電気抵抗測定Ⅱ

    高圧学会  1999 

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  • Dielectric to metal transformations at magabar pressures: Electrical conductivity measurements

    International Conference on High Pressure Science and Technology (AIRAPT-17)  1999 

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Awards

  • JPSJ Papers of Editors' Choices

    2022.10   Journal of the Physical Society of Japan   Site Split of Antiferromagnetic α-Mn Revealed by 55Mn Nuclear Magnetic Resonance

    Masahiro Manago, Gaku Motoyama, Shijo Nishigori, Kenji Fujiwara, Katsuki Kinjo, Shunsaku Kitagawa, Kenji Ishida, Kazuto Akiba, Shingo Araki, Tatsuo C. Kobayashi, Hisatomo Harima

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  • JPSJ Papers of Editors' Choices

    2008   Journal of the Physical Society of Japan   High Pressure NQR Measurement in CeCu2Si2 up to Sudden Disappearance of Superconductivity

    Kenji Fujiwara, Yoshiki Hata, Keigo Kobayashi, Kiyotaka Miyoshi, Jun Takeuchi, Yoshiyuki Shimaoka, Hisashi Kotegawa, Tatsuo C. Kobayashi, Christoph Geibel, Frank Steglich

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    Country:Japan

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Research Projects

  • Exploring Novel Functionalities in Asymmetric Quantum Matters through Precise Measurements

    Grant number:23H04868  2023.04 - 2028.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

    柳澤 達也, 小林 達生, 井澤 公一, 木俣 基, 橘高 俊一郎

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    Grant amount:\187200000 ( Direct expense: \144000000 、 Indirect expense:\43200000 )

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  • Research Management of Unveiling, Design, and Development of Asymmetric Quantum Matters

    Grant number:23H04866  2023.04 - 2028.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

    鬼丸 孝博, 大槻 純也, 田端 千紘, 柳澤 達也, 大原 繁男, 吉田 紘行, 網塚 浩, 井澤 公一, 小林 達生, 小林 夏野, 木俣 基

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    Grant amount:\299520000 ( Direct expense: \230400000 、 Indirect expense:\69120000 )

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  • Magnetic properties of alpha-Mn under high pressure, Anomalous Hall effect and quantum critical phenomena

    Grant number:21H01042  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    小林 達生

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    Grant amount:\13780000 ( Direct expense: \10600000 、 Indirect expense:\3180000 )

    本研究の最重要課題は、Mn単体の室温での安定相であるα-Mnの常圧および高圧下での磁気秩序状態を明らかにすることである。当研究グループでは、α-Mnにおいて二つの磁気秩序相からなる圧力-温度相図を示すことを発見し、常圧近傍は反強磁性(AFM)相であり、高圧相は弱い強磁性(WFM)相であることを明らかにしている。
    2021年度は原子力機構との共同研究により、J-PARCで高圧下WFM相での中性子散乱実験に成功した。その結果、WFM相では核散乱以外に新たな散乱ピークは現れないことから、スピン構造は強磁性であることが明らかになった。この結果は、WFM相で現れる異常ホール効果がベリー曲率に起因することを強く支持する。現在、スピン秩序構造の詳細の解析を進めており、今後高圧下ゼロ磁場NMRの結果と合わせて、WFM状態の全貌を明らかにする。
    一方、常圧のAFM状態については、1972年にゼロ磁場NMRで観測されたスペクトルの解釈ができていなかった。昨年度、試料の純良性の向上により、従来得られている結果とは質的に異なるスペクトルが得られ、その全貌が明らかになった。(島根大との共同研究)この結果は、1970年代に行われた中性子散乱実験で提案されているスピン秩序構造では説明できない。今後中性子散乱実験を行い、NMRの結果と合わせてスピン構造を明らかにする必要がある。(原子力機構との共同研究)

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  • High-pressure reearch for magnetically mediated superconductivity in alpha-Mn

    Grant number:18K03517  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kobayashi Tatsuo

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    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    The pressure-temperature phase diagram of alpha-Mn is established. The weak ferromagnetic (WFM) phase is discovered under high pressure, where a huge anomalous Hall effect (AHE) is observed. The AHE emerging due to the change of the ordered state is the first case, indicating that the origin is the Berry curvature in the ordered state with irreducible representation same as the ferromagnet. At the critical pressure where the WFM phase disappears, the electrical resistance shows T^5/3 dependence in the wide temperature range, indicating the existence of the ferromagnetic fluctuation. The superconductivity has not been observed in the pressure range up to 17 GPa. The ferromagnetic fluctuation in the noncentrosymmetric metal causes the lack of the band degeneracy which is required in the formation of Cooper pairs.

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  • Odd-parity multipole order and parity-fluctuation superconductivity under high pressure in Cd2Re2O7

    Grant number:18H04323  2018.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    小林 達生

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    Grant amount:\8710000 ( Direct expense: \6700000 、 Indirect expense:\2010000 )

    Cd2Re2O7において、空間反転対称性が失われる構造相転移(Ts1転移)が消失する臨界圧力近傍でp波超伝導の兆候が観測され,これに注目した研究を行った。
    (1) NQR:京大・石田グループとの共同研究でRe-NQR測定を行った。加圧によりスペクトルの幅が広がるが,3.1 GPa(IV相)までの測定に成功した。3.1 GPaでは緩和時間T1のコヒーレンスピークが消失する兆候が観測され,理論的に提案されている等方的p波の可能性が示唆された。より高圧までの詳細なデータをとるためには,スペクトル幅が広がる原因究明が必須である。
    (2) 比熱:光交流法比熱測定により,6.5 GPaまでの超伝導転移の観測に成功した。転移温度や臨界磁場Bc2の圧力変化は電気抵抗測定から決定された以前の実験結果に一致しており,高圧下におけるBc2の増大がバルクの性質であることが明らかになった。超伝導状態では試料の熱伝導が悪くなるために,交流法での比熱の定量的評価は不可能であった。
    (3) ホール効果:4.7 GPaまでの測定に成功し,圧力-温度相図に対応したホール係数の変化が観測された。低温相では電子に比べてホールの移動度が減少しており,圧力誘起相(IV, VII, VIII)ではその傾向が増大する。この振る舞いはホールバンドの分裂やそのゆらぎ効果による有効質量の増大で説明できる。
    (4) 応力下でのシングルドメイン試料での物性測定:単結晶を用いた実験ではTs1転移以下でマルチドメインになるため,物性の異方性が明らかになっていない。東大物性研・廣井グループとの共同研究により,ピエゾ素子を用いて結晶軸をそろえ,電気抵抗の異方性を測定することに成功した。その結果,II相では Rc > Ra,III相では Rc < Ra であり,わずかな結晶構造の変化にもかかわらず異方性は最大25%に達する。

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  • Spin-controlled molecular spatial configuration and related magnetic-field-induced phenomena

    Grant number:16H04009  2016.04 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Matsuda Yasuhiro

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    Grant amount:\12350000 ( Direct expense: \9500000 、 Indirect expense:\2850000 )

    The phase diagram of solid oxygen was obtained in magnetic field-temperature plane. The α-β, β-γ phase boundaries were measured by the magneto-caloric effect and the triple point between the high-magnetic-field θ-, γー, and β-phases was also determined. The technique for the magnetostriction measurement in ultrahigh magnetic fields has been developed using the fiber Bragg grating. The quantum spin-state transition in LaCoO3 was detected as the structural phase transition by applying ultrahigh magnetic fields of up to 150 T. This technique was also applied to uncover the properties of the Kagome lattice, volborthite. The S=1/2 and S=1 spin ladder organic compounds BIP-BNO and BIP-TENO have been investigated by the magnetization process and found that the S=1 spin ladder exhibits unusual magnetization process, by contrast that the S=1/2 compound shows predictable magnetization process. These facts suggest that the strong spin-lattice coupling and its dynamics are important.

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  • Search for superconducting phase in electronic ferroelectric iron oxides

    Grant number:25620071  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Yoshii Kenji, KOBAYASHI Tatsuo, YONEDA Yasuhiro, SAITOH Hiroyuki, FUKUDA Tatsuo, MATSUMURA Daiju, IKEDA Naoshi

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    Grant amount:\4030000 ( Direct expense: \3100000 、 Indirect expense:\930000 )

    We have searched for a superconducting phase in electronic ferroelectric multiferroic RFe2O4 (R: rare earths). Electrical resistivity measurements were performed under high pressures up to 4 GPa to increase the interactions between the Fe ions inside the Fe-O plane. Although the pressure was raised up to 4 GPa, the system remained semiconducting. However, a slight change was observed for YFe2O4 around 1-2 GPa; the activation energy was slightly decreased at higher pressures. Also, the elemental substitution at R site was attempted. We found that the magnetic transition temperature (250 K) was increased by 5-10 K by the substitution of the large R3+ ion (Dy3+). This result is interesting from the viewpoint of a search for room temperature multiferroic materials.

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  • Development in calculations for electronic states near the quantum critical point in strongly correlated f-electron systems

    Grant number:22340099  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HARIMA Hisatomo, KOBAYACHI Tatsuo, SUGAWARA Hitoshi, KUSUNOSE Hiroaki, OTUKI Junya, SUZUKI Michi-to

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    Grant amount:\18720000 ( Direct expense: \14400000 、 Indirect expense:\4320000 )

    Novel physical properties in many strongly correlated electronsystems are realized when a several ground states are competingin a certain parameter. A large Coulomb interaction plays a important role even in lower symmetry system. A computer code for performing calculations of such the electronic states, have been developed, considering the real symmetry. The electronic statesof UCoAl, which shows quantum critical phenomena under pressure, and other systems have been studied.

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  • 高圧下精密物性測定によるf電子系化合物の量子相転移と超伝導の研究

    Grant number:21102513  2009 - 2010

    日本学術振興会  科学研究費助成事業  新学術領域研究(研究領域提案型)

    小林 達生

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    Grant amount:\8710000 ( Direct expense: \6700000 、 Indirect expense:\2010000 )

    本研究ではインデンターセルを用いた各種精密測定の開発を通じて,重い電子系化合物の圧力誘起量子相転移の研究を行うことを目的としている.
    1.高圧下ホール効果測定
    CeCu2Si2における高圧下での超伝導転移温度Tc増大の機構解明のため,単結晶試料を用いたホール効果の測定を行った.3.5GPaまでの実験に成功し,Tcが上昇し始める3.OGPa以上で,「異常ホール効果」で説明できないホール効果の増大が低温で観測された.Tcが最大となるのは4.0GPaであり,より高圧までの実験が急がれるとともに,このホール効果増大の機構解明が必要である.
    2.高圧下比熱・交流帯磁率測定
    スクッテルダイト構造をもつSmOs4Sb12ではSmイオンの価数が温度変化を示すことが知られており,磁場に鈍感な重い電子状態との関連が注目されている.高圧下での秩序状態を解明するために,交流帯磁率測定および比熱測定を行った.その結果、両測定で強磁性転移温度の上昇が観測されたが,転移点での交流帯磁率のピークは著しく減少し,一方比熱異常は著しく増大することがわかった.この結果から,高圧下の秩序状態は単純な強磁性秩序ではなく,多重極秩序である可能性が示唆される.
    3.高圧下ひずみ測定
    強磁性体UIrでは3つの強磁性相FM1-3が存在し,FM3-非磁性転移圧力近傍で超伝導が出現する.これまでの研究で,圧力誘起構造相転移が存在する可能性が指摘されていたため,室温でのひずみと電気抵抗の圧力変化により検証した.その結果,3GPa以下で2つの一次相転移を発見し,3つの相I-IIIが存在することがわかった.III相はFM3と超伝導を示す構造相であるが,静水圧性の良い条件下では低温で不安定でII相に転移することがわかった.超伝導転移にともなうマイスナー効果がわずかしか観測されないことは,この事実に起因するものと考えている.

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  • Experimental studies of ferromagnetic superconductivity and valence fluctuation effect under high pressure

    Grant number:20340090  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    KOBAYASHI Tatsuo

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    Grant amount:\17940000 ( Direct expense: \13800000 、 Indirect expense:\4140000 )

    The existence of two structural phase transitions is discovered in a ferromagnet UIr. The ferromagnetic critical point and the superconductivity belong to the high-pressure phase III. Phase III is unstable at low temperatures, which may causes the small Meissner effect. In CeCu_2Si_2, the anomalous Hall effect is observed in the pressure region of enhanced T_c, which may be attributed to the charge fluctuation due to the valence transition of Ce ions and then may be related to the enhancement of T_c.

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  • PrFe4P12の圧力誘起金属-絶縁体転移の機構解明と新たな圧力誘起相の探索

    Grant number:18027008  2006 - 2007

    日本学術振興会  科学研究費助成事業  特定領域研究

    小手川 恒, 小林 達生, 藤原 賢二, 赤澤 輝彦

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    Grant amount:\8000000 ( Direct expense: \8000000 )

    PrFe_4P_<12>の圧力誘起金属-絶縁体転移の研究に引き続き,スクッテルダイト化合物の圧力誘起量子現象に関する研究を行った.SmOs_4Sb_<12>は磁場に鈍感な重い電子状態を持ち,その起源が従来の磁気的な近藤効果を通したものではなく,f電子の多極子モーメントの自由度やラットリングと呼ばれる格子の自由度が関連していると指摘されている.我々はこの物質の圧力効果に着目し,高圧下Sb-NQR測定を行った.その結果,近藤効果がコヒーレントになる特徴的な温度で核スピンースピン緩和率1/T_2に電荷揺らぎに起因した異常を発見した.この異常は0.8GPa程度で最も顕著になり,同じ圧力下で電気抵抗率に非フェルミ液体的振る舞いも観測されることが分かった.これらの結果は従来の磁気臨界点近傍の重い電子系物質では見られなかった振る舞いであり,SmOs_4Sb^<12>の重い電子状態に電気的な自由度が関与していることを強く示唆している.また.高圧下磁化測定,帯磁率測定も行った.SmOs_4Sb^<12>は常圧で約2.5Kのキュリー温度を持つ強磁性体と報告されているが.我々は高圧下で強磁性的な振る舞いは消え,自発磁化は約2 Gpaでほぼ消失することも明らかにした.このことは基底状態が単純な強磁性でないことを意味し、磁気モーメントとは別の秩序変数(多極子モーメント)の存在を示唆する.

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  • Anomalous Magnetic Properties of Molecular Oxygen Adsorbed in Microporous Metal-Organic Solids

    Grant number:16074210  2004 - 2007

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Priority Areas

    KOBAYASHI C. Tatsuo, KOTEGAWA Hisashi, KINDO Koichi, MITA Yoshimi

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    Grant amount:\9600000 ( Direct expense: \9600000 )

    Molecular oxygen forms 02-02 dimer in the coordination space of CPL-1 [Cu2(pzdc)2(pyz)]. It is found that the arrangement of 02 is associated not only with the interaction between the guest molecules and the host compound but also with the intermolecular interaction. The ab initio calculation of 02-02 dimer has pointed out that the magnetic interaction contributes to the formation of the H-structure alignment with singlet ground state (S = 0) while the most stable alignment of the quartet state (S = 2) is known to be different. Therefore we predicted the field-induced rearrangement in condensed 02 system in general.
    In this project, we have investigated the relation between the arrangement and the magnetic properties of 02 adsorbed in the coordination space by means of x-ray powder diffraction and magnetic measurements. In the case of CPL-1, the magnetization process and the temperature dependence of susceptibility can be interpreted by considering the excited state with different molecular arrangements. Similar magnetic properties have been observed in 02 adsorbed in Cu-CHD [Cu-1,4-cyclohexanedicarboxylic acid]. Though the MEM/Rietvelt analysis to determine the arrangement of adsorbed 02 is now in progress, the observed magnetic properties can be explained by same model. In CPL-p1 [Cu(dhba)2(4,4' -bpy)] and CID-4 [Cd(bpndc) (bpy)], the magnetization processes of adsorbed 02 show the metamagnetic transitions which depends on the adsorption. Though the arrangement of 02 is not clear, it is clear that the coordination spaces in these compounds are larger than that of CPL-1 or Cu-CHD. It is naturally considered that the existence of a few adsorption sites causes the adsorption dependence.
    Up to now the direct observation of field-induced rearrangement has not been succeeded. For CPL-1, the critical field is too high to carry out the XRD experiment. For Cu-CHD with lower critical field, the observation of field-induced rearrangement by XRD measurement is expected.

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  • PrFe_4P_<12>の圧力誘起金属-絶縁体転移の機構解明と新たな圧力誘起相の探索

    Grant number:16037210  2004 - 2005

    日本学術振興会  科学研究費助成事業  特定領域研究

    小林 達生, 小手川 恒, 赤澤 輝彦, 武田 圭生

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    Grant amount:\8900000 ( Direct expense: \8900000 )

    本研究では高圧下でスクッテルダイト構造を反映した特徴的な物性を探索し,その発現機構を明らかにすることを目的としている.
    1.PrFe_4P_<12>の圧力誘起金属-絶縁体(M-I)転移
    PrFe_4P_<12>の圧力誘起M-I転移の発見に引き続き,その起源解明に向けて磁化、ホール効果、NMR測定を行った.発見当初は低温の電気抵抗上昇の原因として磁気散乱の急激な増加の可能性も考えられたが,高圧下ホール効果測定を行い,バンド絶縁体状態が実現していることを見出した.また,高圧下NMR測定を行い金属状態から絶縁体状態への変化がクロスオーバー的な現象ではなく相転移であることを明らかにした.NMRスペクトルと磁化測定の結果から絶縁体相は約2μ_B程度の磁気モーメントを持つ反強磁性秩序相であることが分かった.
    2.その他のスクッテルダイト化合物における新たな圧力誘起相の探索
    PrFe_4Sb_<12>,PrOs_4Sb_<12>,PrOs_4P_<12>,NdFe_4P_<12>,NdOs_4Sb_<12>,NdRu_4Sb_<12>,SmOs_4Sb_<12>,LaFe_4P_<12>,LaRu_4P_<12>,LaFe_4Sb_<12>における4GPaまでの圧力効果を調べた.この中で圧力効果の大きかったものとして重い電子系物質SmOs_4Sb_<12>があげられる.常圧のSb-NQR測定において2Kの強磁性転移が本質的であることを明らかにしたが,この2Kのキュリー温度は加圧と共に急激に上昇していくことが分かった.つまり,SmOs_4Sb_<12>は常圧で強磁性臨界点の近傍に位置していることを意味している.このような系は過去にCe系,Yb系では報告があるが,Sm系では初めてである.また,このことが重い準粒子形成に大きく寄与していると考えられる.

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  • Development of NMR under high pressure and investigation of pressure-induced quantum fluctuation

    Grant number:15340119  2003 - 2005

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    KOBAYASHI T.C., KOTEGAWA H., FUJIWARA K.

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    Grant amount:\15800000 ( Direct expense: \15800000 )

    This project aims at understanding the nature of pressure-induced quantum fluctuation by NMR measurement. In the case of conventional piston-cylinder high-pressure cell, the maximum pressure is limited as 2-3 GPa. In this project, we have developed "indenter cell" and then carried out successfully NMR measurement up to 5 GPa. Every one of following applications is first case of precise measurement in this pressure-range.
    1.Pressure-induced enhancement of Tc in CeOu_2Si_2
    It has been believed that the superconductivity at ambient pressure is mediated by spin fluctuation. It is found from Cu-NQR measurement that an application of pressure suppresses the spin fluctuation drastically in spite of Tc enhanced. The gapless superconductivity similar to ambient pressure occurs even at pressure where Tc is enhanced.
    2.Pressure-induced metal-insulator transition in PrFe_4P_<12>
    The M-I transition has been found by our group. It is found from P-NMR measurement that the Pr moments order antiferromagnetically in the insulating phase and the M-I transition is of first order.
    3.Pressure-induced metal-insulator transition in LiV_2O_4
    As a result of Li-NMR measurement, it is found that the spin fluctuation is enhanced toward the appearance of M-I transition, suggesting that the magnetic instability may induce the M-I transition.
    We have found the novel pressure-induced superconductivity in following f-electron systems. UIr is first case of pressure-induced superconductivity in the ferromagnet without inversion symmetry. In CeNiGe_3, the superconductivity occurs in the pressure range far from the magnetic instability point.

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  • Study on Quantum Phase Transition of Magnetic Materials induced by Very High Field

    Grant number:13130203  2001 - 2004

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Priority Areas

    KINDO Koichi, NARUMI Yasuo, TAKEUCHI Tetsuya, KOBAYASHI Tatsuo, HAGIWARA Masayuki, SAKAI Toru

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    Grant amount:\115100000 ( Direct expense: \115100000 )

    We have developed in this study the magnet system to carry out the magnetization measurement up to 70 T as a usual manner and succeeded in observing various quantum phenomena induced by very high magnetic field. For example, we have succeeded in observation of wholel/4 plateau in BlP-TENO, which has been regarded as an S=1 antiferromagnetic spin ladder material. As the magnetism of this material comes from free radical, spin should be 1/2 but there is large ferromagnetic interaction between the spins that makes two spins resulted spin 1. From a crystal structure analysis, spin 1 form a spin ladder and the interaction between spin 1 is found to be antiferromagnetic from the magnetic measurements at low field. Up to now, high field magnetization measurement has showed that 1/4 plateau begins around 44 T but it is not obvious that the 1/4 plateau exists in this system. The end of 1/4 plateau has been observed for the first time in our study by extending the magnetization measurement up to 70 T and it also allow us to see the whole plateau region, which begins around 44 T and ends around 65 T. Another striking example is a of S=1. Recently, it has become clear that magnetism of the molecule disappears in a different manner as the antiferromagnetic ordering when it is adsorbed into micro-pores of some copper complex materials. We have succeeded in observation of transition from non-magnetic state to magnetic one by applying high field. It is also interesting point that there is no plateau though the S=1 molecules form spin ladder in the materials.

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  • Search for superconductivity in light alkaline metals

    Grant number:13640364  2001 - 2002

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    SHIMIZU Katsuya, HAMAYA Nozomu, KOBAYASHI Tatsuo

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    Grant amount:\3600000 ( Direct expense: \3600000 )

    Superconductivity in low-Z elements are expected to occur at high-temperatures because of their high Debye-temperatures according to conventional BCS theory. Hydrogen, the lightest element is predicted the highest superconducting transition of near ambient temperature under its possible metallic state at very high-pressure above 400 Gpa which is experimentally difficult region to reach. Among the all elements Li is the lightest metal and several ptedictions for the existence of superconductivity, however experimentally no superconductivity is observed at atmospheric pressure. Here we report the superconductivity in compressed Li under ptessure above 30 Gpa. The superconducting transition temperature steadily rose up and reached 20 K at 48 Gpa which is the highest value for elements. The present results encourage remarkable expectrations about the high-Tc superconductivity for low-Z elements, especially for metallic hydrogen.

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  • NMR用超高圧DAC装置の開発と圧力誘起分子性金属状態の研究

    Grant number:12874039  2000 - 2001

    日本学術振興会  科学研究費助成事業  萌芽的研究

    藤原 賢二, 小林 達生

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    Grant amount:\2300000 ( Direct expense: \2300000 )

    DAC-NMRの予備実験として、極微小NMR用受信コイル(外径300μm、高さ250μm、線径25μm)を作製し、非金属ガスケヅトの圧力空間内にコイルをセットして、常圧下で信号観測を試みた。試料には、NMR信号強度の大きな遷移金属化合物LiV_2O_4、有機化合物NDMAPなどを用いた。現在までに、強磁場下でNDMAPの水素(H)の信号観測に成功している。また、10GPa以上の圧力発生のためにはコイルをさらに小さくする必要があり、線径15μmの極微細銅線作製を入手して種々のNMRコイルを作製して予備実験を重ねている。線径が細いため加圧時の断線が頻発しており、試料空間内のコイルからいかにリード線を取り出すかが課題となっている。水素以外の種々の核に応用可能かどうかについても検証する必要があり、より広範囲の周波数、種々の試料でのNMR実験を行いたいと考えている。
    DAC-NMRの別のアプローチとして非金属ガスケット外にコイルを置く方式も検討中である。100GPa領域を念頭におく場合には、前段の方式では圧力発生に限界があるためである。問題は,試料充填率の著しい低下による、信号強度の著しい減少が予想される点にある。観測対象は限定されるが、この方式は将来のメガバール領域のNMR実験に道を開くものと考えている。

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  • Search for Superconductivity of Magnetic Metals under Pressure

    Grant number:11304022  1999 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    AMAYA Kiichi, NASU Saburo, KOBAYASHI Tatsuo, SHIMIZU Katsuya, SUZUKI Naoshi

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    Grant amount:\36910000 ( Direct expense: \36700000 、 Indirect expense:\210000 )

    1. Complex condition of low temperature down to 30mK and high pressure up to 200GPa is achieved. experimental techniques for electrical, magnetic and optical measurement under extreme conditions are developed.
    2. Search for superconductiyity of iron in its non - magnetic state under pressure are performed by the following procedure ; a. Purification of iron is performed in ultra high vacuum. b. Purified sample is pressed in NaCl pressure media by diamond anvil cell (DAC). c. Electrical resistance and magnetization measurement are performed in the course of both inereasing and decreasing process of pressure.
    3. Results
    Onset of superconductivity is found by the drop of electrical resistance and also confirmed by the detection of Meissner effect. Temperature vs pressure phase diagram is obtained. Tc appears at 15GPa just after the crystal phase transition from bcc to hep phase and disappears at 30GPa. The maximum of Tc and Hc is 2K and 2000Oe respectively.
    4. Other Results
    (1) Mossbauer experiment under low temperature and high magnetic field is performed and we confirmed the magnetism of iron at hep phase was due to conduction electron )pauli para magnetism).
    (2) The first principle band calculation is performed and estimation of Tc is given.
    (3) We have also studied the case of antiferromagnetic Mn. We found that the Neel temperature Tn disappears at around 9GPa but no sign of superconductivity is found yet even for purified sample.
    (4) Pressure induced superponductiyity of ferromagnet UGe_2 is studied in detail by electrical resistance and heat capacity measurement and determined the Tc - pressure phase diagram.

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  • Strongly Correlated Electron Phase under Multiple Environment

    Grant number:10CE2004  1998 - 2002

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for COE Research

    MIYAKE Kazumasa, SUGA Shigemasa, ONUKI Yoshichika, KITAOKA Yoshio, SHIMIZU Katsuya, ITOH Tadashi

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    Grant amount:\1126000000 ( Direct expense: \1075000000 、 Indirect expense:\51000000 )

    Research was performed in the following three subject : [1] Properties of strongly correlated electrons, [2] Correlated electron phase in confined systems, and [3] Electron phases under ultra-high pressures.
    [1] Properties of strongly correlated electrons (Miyake, Kitaoka, OnuK, Suga)
    New mechanism of superconductivity of due to critical valence fluctuations is found, new types of mechanism are proposed for superconductivity in Uge_2, Upd_2Al_3, PrOs_4Sb_<12>, (TMTSF)_2PF_6, and the phase of CeCu_2Si_2 and CeRhIn_5 coexisting with the antiferromagnetism (Miyake). By means of NMR/NQR techniques, spin-triplet superconductivity in heavy-fermion (Upt_3 and Uni_2Al_3) and rutenate oxide (Sr_2RuO_4) systems, microscopic coexisting phase of antiferromagnetism and superconductivity in heavy-fermion compounds under pressure, a nano-scale coexistence of antiferromagnetism and superconductivity in multilayered high-temperature superconductors, have been discovered (Kitaoka). High-quality single crystals of cerium and uranium compounds over fifty in number have been grown, and their magnetic and Fermi-surface properties have been clarified (Onuki). High resolution (energy and wave vector) soft X-ray photoemision spectroscopy of rare earth and transition metal compounds have been succeeded for the first time in the world, and many controversies are solved and going to be solved by this break through of the bulk sensitive technique (Suga).
    [2] Correlated electron phase in confined systems (Itoh, Cho, Hiyamizu, One, Ogawa, Nozue)
    Both in the strong and weak confinement regimes, the dependencies of exciton energy and life time upon the number of excitons in a single nano-structure were studied and the evidence of electron correlation in confined systems and its relation with optical nonlinearities were found. The concept of photonic de Broglie wavelength in correlated photon system was verified (Itoh). A new theoretical scheme of "microscopic nonlocal optical response of matter" has been highly developed and applied to various linear and nonlinear processes in nanostructures and related systems (Cho). Room temperature oscillation of MBE-grown In_<0.1>Ga$_<0.9>As/(GaAs)_6(AlAs)_1 quantum wire (QWR) lasers on (775)B GaAs substrates with an emission wavelength range of 0.85μ was demonstrated, and extremely uniform (221)A In_<0.22>Ga_<0.78>As/GaAs quantum wires were fabricated (Hiyamizu). For the purpose of creating novel effects based on spin-polarized current, magnetoresistive control of a manganite by spin-polarized current, spin injection from ferromagnet into superconductor, and current-induced domain wall motion were studied experimentally (Ono). "Photoinduced Phase Transition" was studied theoretically to clarify the phase-separation dynamics, formation of classical and quantum orders, and quantum many-body effects on linear/nonlinear optical responses in photoexcited nonequilibrium states of many-electron systems (Ogawa). The spatial distribution and the electron transport phenomena of edge state in integer and fractional quantum Hall system are found to be strongly affected by the confinement potential, and an orbital degeneracy of alkali metal clusters in zeolite is found to play an important role for its ferromagnetism (Nozue).
    [3] Electron phases under ultra-high pressures (Suzuki, Nasu, Shimizu, Kobayashi)
    It has been shown for the first time that the pressure-induced insulator-metal transition in solid oxygen would be realized by band overlapping (Suzuki). High pressure ^<57>Fe Mossbauer measurements have been performed, clarifying the magnetic property of ε-Fe which is a high-pressure phase of metallic Fe (Nasu). Techniques of generating very low-temperature and ultra high-pressure and measuring physical properties have been developed, and superconductivity under pressure was discovered in simple systems, such as oxygen, iron, lithium and organic molecular crystals, an ionic crystal, etc. (Shimizu). By means of newly developed high-pressure cell, the pressure-induced magnetic-nonmagnetic transition, superconductivity and charge-ordering have been found in the U- and Ce-based heavy electron compounds, particularly in the ferromagnetic superconductor Uge_2, the bulk nature of the superconductivity was established by the heat capacity measurements (Kobayashi).

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  • 静水圧性の良い20GPa級圧力セルを用いた圧力誘起超伝導体の探索

    Grant number:09740281  1997 - 1998

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    小林 達生

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    Grant amount:\2200000 ( Direct expense: \2200000 )

    1. ダイヤモンドアンビルセル(DAC)で液体媒体を用いることにより、高静水圧下での電気抵抗測定を行うことに成功した。DACは数百万気圧に及ぶ超高圧発生が可能なデバイスで、この度液体媒体を用いた電気抵抗測定技術を確立したことにより、本研究のテーマである20万気圧を超える圧力までの高い静水圧下での圧力誘起超伝導の探索が行えるようになった。この技術では穴のあいた絶縁ガスケットの開発、マイクロマニピュレーターを用いた融着法による微小試料への電極付けの開発が行われた。
    この技術を用いて、CeRh_2Si_2の圧力誘起超伝導の探索を行った。1.2GPaで超伝導と思われる電気抵抗の落ち(Tc〜0.6K)を観測したが零抵抗は観測されなかった。この超伝導が本質的であるかどうかは、今後の試料依存性の研究が必要である。重い電子系CeCu_6、CeB_6についても実験を行ったが、未だ超伝導は観測されていない。
    2. 前年度開発した5GPa級インデンター型高圧セルを用いて、交流帯磁率測定によるPbのマイスナー効果の測定を行い、低温で5GPaの発生圧力を記録した。Pbは圧力決定物質として用いられる。またTiの超伝導転移(Tc〜0.39K)を確認し、極低温での使用が可能であることがわかった。これを用いて現在CeIn_3の圧力誘起超伝導の探索を行っている。
    3. 3GPa級非磁性ピストン-シリンダー型高圧セルについては電極の試料空間への導入が困難であり、まだ実用化には至っていない。予備実験としてはこの高圧セルを用いたNMR測定を常圧下で行いスペクトルに大きな変化がないことを確認した。

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  • 重い電子系の超伝導に関する極限条件下の物性測定

    Grant number:08223221  1996

    日本学術振興会  科学研究費助成事業  重点領域研究

    天谷 喜一, 石塚 守, 小林 達生

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    Grant amount:\1800000 ( Direct expense: \1800000 )

    我々のグループでは、ダイヤモンドアンビルセルを用いた超高圧(20GPa)・極低温(50mK)下での電気抵抗・磁気測定の強相関電子系への適応を検討してきた。現状では予測される圧力の一軸性、分布のためにゼロ抵抗の観測には至っていないが、常伝導状態の電気抵抗およびTcの磁場変化の実験に成功した。今までに得られた結果は以下の通りである。
    CeCu_2Si_2でみられる高圧下でのTcの上昇とCeCu_2Ge_2のTcの圧力変化)
    1.CeCu_2Ge_2においてもP>16.5GPaの高圧下でTcの増大を観測した。
    2.Hc-Tc相図はCeCu_2Si_2,CeCu_2Ge_2それぞれの2つの超伝導相で類似している。すなわち重い電子系の超伝導の特徴を示している。
    3.超伝導相図のH=0近傍の立ち上がり(-dH_<C2>/dT)は、常伝導状態の電気抵抗から見積もられる有効質量の変化とTcの変化で説明できる。
    CeRu_2Ge_2における圧力誘起超伝導の探索)
    1.P=10GPa近傍を境界にして、低圧側では長距離秩序状態、高圧側ではフェルミ液体状態を反映した電気抵抗が観測された。
    2.P<15GPa、T>50mKの温度・圧力領域で超伝導は観測されなかった。
    3.5GPa<P<10GPaの圧力領域(長距離秩序状態)で比較的低磁場(H<4T)で減少する電気抵抗の磁場変化が観測された。これは秩序状態が強い強磁性相関をもっていることを反映しており、このために超伝導が出現しないと考えている。
    4.P=9GPa近傍でCeRu_2Si_2に類似した電気抵抗の温度変化が観測されたが、磁場変化ではメタマグによる異常は観測されなかった。

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  • 一次元細孔に吸着した酸素分子の磁性の^<17>O-NMRによる研究

    Grant number:08740281  1996

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    小林 達生

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    Grant amount:\1100000 ( Direct expense: \1100000 )

    今年度スペクトロメーターの整備が遅れたためにNMR測定は行えなかった。予備実験として、今年度までに一次元細孔を有する次の二つの物質に物理吸着した酸素分子の磁気測定、比熱測定を行った。
    1.Cu trans-1,4-cyclohexanedicarboxylic acid
    低吸着量で帯磁率は30K近傍にショットキー型のピークを示す。磁化過程はH=35Tを臨界磁場とする一段のメタマグ的転移後2μ_B/O_2に飽和する。これらの結果はS=1/2反強磁性ダイマーモデルで説明でき、一重項酸素の出現を示唆すると考えている。双方から求められるg-は値はそれぞれg=2.4、g=2.0と大きく食い違っているが、吸着状態が温度変化し高温では通常の三重項状態が支配的になると考えている。吸着量を大きくするとダイマーモデルからのズレがみられるが、ダイマー間の相互作用か吸着状態のランダムネスによるものと考えている。比熱測定では異常に大きな磁気比熱が観測された。一重項酸素の出現に関連しているのかもしれない。
    この異常な吸着状態を明らかにするために、NMRを行い微視的に酸素の磁性状態を研究することはたいへん興味深く今後精力的に行う予定である。
    2.ゼオライト(ZSM-23)
    磁化過程の測定では一次元反強磁性体に特徴的な直線的変化が得られているが、S=1の系で期待されるHaldaneギャップは観測されていない。帯磁率の温度変化では30K近傍にわずかな折れ曲がりが観測されるが低温領域での常磁性的な増大が大きく、その温度依存性を議論するには至っていない。比熱は期待される短距離秩序を示すブロードなピークが観測された。
    それらの結果は1.の系と大きく異なり通常の三重項酸素状態で説明できるものである。この系ではゼオライトの陽イオンがランダムに存在しているため酸素が一様な鎖を形成せず、相互作用がランダムに分布していると考えている。

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  • Solid Hydrogen under Ultra High Pressure

    Grant number:07404018  1995 - 1998

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    AMAYA Kiichi, MIYAGI Hiroshi, ISHIZUKA Mamoru, KOBAYASHI Tatsuo, ENDO Shoichi

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    Grant amount:\29600000 ( Direct expense: \29600000 )

    Solid hydrogen is electrically insulator at low pressure but it is expected to show conductivity under pressure at Mbar region. Our purpose is to detect, the metallization not, by indirect optical measurement, but by more direct, electrical resistance measurement. First of all, we tried to produce ultra-high pressure and to develop the techniques of electrical and magnetic measurement under the produced pressure. In fact, we developed DAC (diamond anvil cell) specially designed for ultra-high pressure and succeeded to make fine electrodes with 5 μm width on the pressure surface of 30 μm diameter and so, we are ready for electrical resistance measurement of solid hydrogen with volume of 〜 10ィイD1-8ィエD1cc. High pressure of 2.25 Mbar was also successfully produced and that the resistance measurement was performed there. This is now the best, record for high pressure experiment. Secondly, on the technical basis established above, we have succeeded in the study of search for metallization and superconductivity under pressure, starting from alkaline earth metal Ca, Vib group of elements such as sulfur (S) and oxygen. Further, we observed, for the first time, the pressure induced superconductivity of ionic crystal CsI and simple organic crystal of CィイD26ィエD2IィイD24ィエD2OィイD22ィエD2. During the experimental process stated above, however, the expected metallization pressure value has changed from previous 1.5 Mbar to 2.5 Mbar. Now, it is reported that, the solid hydrogen is still transparent even under 3.4 Mbar and remains as insulator electrically. Our theoretical group (Miyagi et al.) also estimates that, molecular dissociation of solid hydrogen takes place at pressures at around 4 Mbar where hydrogen is metallic. So, we have to change our experimental program and to produce higher pressure. But, at present, we expect we can reach metallic hydrogen at, pressures between 2 Mbar and 3 Mbar and at temperature of 1000 ℃ 〜 1500 ℃. Now, we started confinement and pressurization of hydrogen. Present results show the difficulty of stable confinement, because of the diffusion into the surrounding metal. There are several difficulties against the metallization of solid hydrogen but still the new experimental techniques are developed and our reports give belief on the successful finding of metallic hydrogen in near future.

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  • 重い電子系の超伝導に関する極限条件下の物性測定

    Grant number:07233215  1995

    日本学術振興会  科学研究費助成事業  重点領域研究

    天谷 喜一, 石塚 守, 小林 達生

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    Grant amount:\2300000 ( Direct expense: \2300000 )

    1.多重極限下の熱測定
    純良単結晶UPt_3の熱測定から超伝導状態の温度-磁場-圧力相図を作成するために、今年度は常圧下での磁場-温度相図の作成、高圧セルの検討を行った。常圧下での比熱測定(温度変化)、磁気熱良効果の測定(磁場変化)から得られた磁場-温度相図は特徴的な三つの超伝導相からなり、すでに報告されている結果と良い一致が得られた。高圧下での測定では測定精度を上げる必要があるため、UPt_3単結晶用に小型の高圧セルを作成し現在圧力発生を行っている段階である。
    2.超高圧下における物性測定
    ダイヤモンドアンビルセルを用いた電気抵抗測定、磁気測定を行いCePd_2Si_2等のCe122系の超伝導の探索を行った。今年度は、常圧下では磁気秩序を示すCePd_2Si_2およびCeRH_2Si_2の圧力誘起超伝導(Pd:Tc=0.2K,P=3.5GPa,Rh: Tc=0.4K,P=1.3GPa)を観測することに成功した。またCeCu_2Ge_2では高圧下で誘起される超伝導(Tc=0.7K)のTcがさらに高圧下で上昇する傾向(Tc=1.4K,P>17GPa)が観測され、CeCu_2Si_2の高圧下でのTcの上昇と同様の振る舞いであると考えている。現在、静水圧性の良い圧力下でのマイスナー効果の測定を行い確認を急いでいる。またこれらの超伝導状態の臨界磁場の測定を行うべく超伝導磁石(14T)用の稀釈冷凍機、DACの製作を行っている。

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  • 一次元酸素分子の磁性

    Grant number:07740296  1995

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    小林 達生

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    Grant amount:\800000 ( Direct expense: \800000 )

    一次元細孔を有する次の二つの物質に物理吸着させた酸素分子の磁気測定を行った。
    1.Cu trans-1,4-cyclohexanedicarboxylic acid
    帯磁率の温度変化では30K近傍のSchottky型のピークとそれ以下の低温域におけるCurie則的増大が観測された。後者を孤立酸素分子の寄与として差し引いた残りはS=1/2反強磁性ダイマーモデルにフィットさせることが出来た。パルス強磁場を用いた磁化過程の測定(T=1.3K)では、H=35Tを臨界磁場とする一段のメタマグ的転移後2μ_B/O_2を飽和値とする磁化が観測された。この結果は上記S=1/2ダイマーモデルを支持する結果である。以上は低吸着量においてみられ、吸着量を大きくするとダイマーモデルからのズレがみられるがS=1一次元反強磁性体やS=1ダイマーとは明らかに異なる結果である。これらの結果について物理的解釈には至っていないが、吸着した酸素分子のS=1状態の不安定性を示唆していると考えられる。
    2.ゼオライト(ZSM-23)
    45Tまでの磁化過程の測定では一次元反強磁性体に特徴的な直線的変化が得られているが、10T以下の低磁場領域で大きな常磁性的振る舞いが観測されており、S=1の系で期待されるHaldaneギャップは観測されていない。帯磁率の温度変化では30K近傍にわずかな折れ曲がりが観測されるが低温領域での常磁性的な増大が大きく、その温度依存性を議論するには至っていない。一次元系の短距離秩序を反映した比熱を観測するために現在比熱測定を準備中である。

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  • ハルデンギャップ反強磁性体の^<15>N-NMRによる研究

    Grant number:06740291  1994

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    小林 達生

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    Grant amount:\900000 ( Direct expense: \900000 )

    1.ハルデンギャップ反強磁性体(CH_3)_4NNi(NO_2)_3(TMNIN)において、Ni^<2+>(S=1)チェーンのNO_2-ボンドのN核を100%^<15>N核で置換した粉末試料の作成を行った。
    2.同時に、TMNIN試料の単結晶化を行った。1×0.1×0.1mm^3程度の大きさの単結晶作成には成功したが、現時点ではNMR測定は不可能である。より大型の単結晶試料作成を、継続して試みている。
    3.H〜10Tの磁場中、測定温度T〜1.3K,4.2Kで、^<15>N核(I=1/2,γ=0.43143kHz/G)のNMRシグナルは観測できなかった。このとき、チェーン間に存在するテトラメチルアンモニウムイオン中の^<14>N核(I=1,γ=0.30752kHz/G)のNMRシグナルは良い感度で観測されており、チェーンサイトの^<15>N核はスピン-格子緩和時間T_1が短いため観測されないと考えている。TMNINの場合、臨界磁場H_c〜3T以上の磁場中ではギャップレス状態であるといわれている。そこではNiスピンのゆらぎが大きく、大きな超微細相互作用をもつと思われるNO_2ボンドの^<15>N核のT_1は非常に短くなっていると考えられる。この場合、H_c以下ではギャップ状態であるため観測される可能性があり、現在実験を進行中である。

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  • 有機分子の磁気的相転移の研究

    Grant number:06218215  1994

    日本学術振興会  科学研究費助成事業  重点領域研究

    天谷 喜一, 長谷田 泰一郎, 蒲池 幹治, 石塚 守, 小林 達生

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    Grant amount:\1700000 ( Direct expense: \1700000 )

    1.ラジカルを有する有機分子磁性体
    本研究では、ニトロキシルラジカルを有するメタクリル酸エステル(MOTMP)及びアクリル酸エステル(AOTMP及びMATMP)及びフェルダジルラジカルを有するp-CDTV、更にはVO^<2+>上の電子が磁性を担う高分子TPPPの磁気相転移を磁気的、熱的測定により調べた。
    2.p-CDTVその他
    NOラジカル以外のラジカルが磁性を担う、かつ強磁性的であるという点で注目されたp-CDTVについて、0.6K近傍で強磁性特有の磁化ヒステレシスを観測した。しかし、交流法磁化率による磁化過程では反強磁性的なスピンフロッピングがあらわれ、現在、結果を解析中である。
    又、TPPPにおいては強磁性的キュリーワイス温度が45Kという高温で、その機構に興味があるが、30mkの極低温に至るまで磁気的長距離秩序は見出されず、今後の課題となった。

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  • Study of Pressure Induced Phase Transition of Molecular Crystals

    Grant number:05452057  1993 - 1994

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for General Scientific Research (B)

    AMAYA Kiichi, ENDO Shoichi, ISHIZUKA Mamoru, KOBAYASHI Tatsuo

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    Grant amount:\6800000 ( Direct expense: \6800000 )

    The purpose of present research is to attain the complex extreme condition of low temperature down to mK and ultra high pressure up to 100GPa and also to study the pressure induced superconductivity of molecular crystals, especially of iodine and bromine.
    Up to now, We have obatined the following results ;
    1. Ultra high pressure of 1000Gpa is attained at temperatures down to 30mK.
    2. pressure induced superconductivity is observed for the first time under the pressure above 90GPa and at temperatures below 1K.
    3. Temperature-Pressure phase diagram of super-normal transition of iodine is completed.
    4. Bisides iodine and bromine, we observed the superconductivity of Ca at 70GPa and 0.2K.
    5. Solidification and optical transparency are now studied for molecular oxygen at high pressures up to 70GPa.

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  • 有機分子の磁気的相転移の研究

    Grant number:05226219  1993

    日本学術振興会  科学研究費助成事業  重点領域研究

    天谷 喜一, 蒲池 幹治, 長谷田 泰一郎, 石塚 守, 小林 達生

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    Grant amount:\1700000 ( Direct expense: \1700000 )

    本研究の目的は、単純な構造をもつ有機分子結晶を対象に磁気測定を行い磁性の詳細、とりわけ磁気相転移、異方性、秩序状態、スピン構造等を解明する事である。
    研究成果
    MOTMP及びMATMPは、NOラジカルが磁性を担う有機分子結晶で天々正のワイス温度をもつ磁性体である。50mKの極低温に至る磁化率磁化の測定を行った結果は、一次元強磁性体としての高温域のふるまいがT_N=0.15Kにおいて反強磁的な3次元的長距離秩序状態に転移する事がわかった。T_N以下の温度で、良質の自作単結晶を用いた磁化過程の観測結果から容易軸型反強磁性体の特徴であるスピンフリップ転移が発見された。磁気的異方性の起源を双極子相互作用に求めた理論的解析が実験をよく説明することから、スピン構造のモデルを提出するに至っている。唯MOTMPとMATMPは鎖間相互作用に違いがあり、その事と関連してMATMPではMOTMPにみられない弱い強磁性効果が見られたが現在解明中である。
    現在、3次元強磁性体を示す物質を探索中であるが、最近P-CDTVにおいて0.6K及び0.7Kにおいて強磁性的遂次相転移を見出している。未だスピン構造決定には至っていないが、強磁性を示す新しいラジカルとして注目に値すると考えている。以上の様に新試料の開発・単結晶作成に成果を挙げる一方で、転移の圧力効果をねらった特製の圧力容器とクライオスタットも製作中である。

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  • ハルデンギャップ反強磁性体NENPの^<14>N-NMRによる研究

    Grant number:05740229  1993

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    小林 達生

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    Grant amount:\1000000 ( Direct expense: \1000000 )

    今年度、NENPにおける^<14>N-NMRのスペクトルについて3〜12Tの磁場、1.3〜40Kの温度領域における実験を行った。その結果を以下に示す。
    1.測定したすべての磁場/温度領域において四重極分裂(I=1)した3組のシグナルが観測された。当初、エチレンジアミン分子中とNO_2イオン内のN核について2サイトからのシグナルが観測されることを予測したが、結晶の低対称性を反映してエチレンジアミン中のN核についてもシグナルが2つに分離して観測されることが分かった。
    2.それらのシグナルの磁場変化、温度変化は一様帯確率だけでは説明されず、スタッガードモーメントの出現を支持している。
    3.^<14>N-NMRのスペクトルのシフトはNi^<2+>サイトに局在モーメントとN核との磁気双極子相互作用だけでは説明できず、NサイトにトランスファーしたNi^<2+>モーメントとN核の磁気双極子相互作用が支配的であると考えられる。
    4.現時点では、有機物質特有の結晶の低対称性(1)や異方的相互作用(2)からくる解析の難しさのために、スペクトルの総合的理解には成功していない。今後、NENPより結晶の対称性の良いNINOにおける^<14>N-NMRを行いNENPと比較検討する予定である。
    さらにTMNINの粉末試料を用いた^1H-NMRを行った。スタッガードモメントの出現を示す低温強磁場中でのラインの広がりは観測されなかった。またこの試料において^<14>N-NMRを試みたが四重極分裂(I=1)のためシグナルは観測されなかった。今後、^<14>N核を^<15>N核(I=1/2)で置き換えた試料における^<15>N-NMRを試みる予定である。

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  • 岡山から快挙を称賛 Newspaper, magazine

    山陽新聞  2025.10.10

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