2021/10/28 更新

写真a

イナダ ヨシヒコ
稲田 佳彦
INADA Yoshihiko
所属
教育学域 教授
職名
教授
外部リンク

学位

  • 博士(理学) ( 東北大学 )

研究キーワード

  • Science Education

  • Heavy Fermion

  • 超伝導

  • 磁性

  • 強相関電子系

  • 重い電子系

  • 科学教育

  • Superconductivity

  • Magnetism

  • Strongly Correlated Electron System

研究分野

  • 自然科学一般 / 磁性、超伝導、強相関系

  • 人文・社会 / 科学教育

学歴

  • 東北大学   Graduate School, Division of Natural Science   Department of Physics

    - 1995年

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  • 東北大学    

    - 1995年

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    国名: 日本国

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  • 東北大学   理学部   物理学第二学科

    - 1990年

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    国名: 日本国

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  • 東北大学   Faculty of Science   Department of Physics

    - 1990年

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経歴

  • - 岡山大学教育学研究科 教授

    2009年10月

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  • - Professor,Graduate School of Education,Okayama University

    2009年

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  • - 岡山県立倉敷天城高校 非常勤講師

    2008年

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  • - part-time teacher,Kurashiki Amaki High School

    2008年

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  • 東京大学物性研究所 客員助教授 准教授   The Institute for Solid State Physics

    2005年 - 2006年

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  • Associate Professor

    2005年 - 2006年

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  • - 兵庫教育大学大学院連合学校教育学研究科兼担 教授

    2004年

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  • - Professor

    2004年

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  • 岡山大学教育学研究科 准教授

    2002年12月 - 2009年9月

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  • Associate Professor,Graduate School of Education,Okayama University

    2002年 - 2009年

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  • Researcher,Visiting Fellow, University of Bristol(U.K)

    2000年 - 2001年

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  • ブリストル大学(英国)客員研究員 研究員

    2000年 - 2001年

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  • 大阪大学大学院理学研究科助手 助手   Graduate School of Science

    1996年 - 2002年11月

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  • Research Associate,Research Associate, Graduate School of Science, Osaka University

    1996年 - 2002年

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  • 大阪大学理学部助手 助手   School of Science

    1995年 - 1996年

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  • Research Associate,Research Associate, Faculty of Science, Osaka University

    1995年 - 1996年

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  • Postdoctoral Fellowships of Japan Society for the Promotion of Science,1994-1995 Research Fellow for Japan Society for the Promotion of Science

    1994年 - 1995年

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  • 日本学術振興会特別研究員 日本学術振興会特別研究員

    1994年 - 1995年

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所属学協会

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委員歴

  • 日本物理教育学会中国四国支部   支部長  

    2012年 - 2014年   

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    団体区分:学協会

    日本物理教育学会中国四国支部

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  • The Physics Education Society of Japan   director  

    2012年 - 2014年   

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    団体区分:学協会

    The Physics Education Society of Japan

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  • The Physics Education Society of Japan, Chugoku-Shikoku branch   chairman  

    2012年 - 2014年   

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    団体区分:学協会

    The Physics Education Society of Japan, Chugoku-Shikoku branch

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  • 日本物理教育学会   理事会理事  

    2012年 - 2014年   

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    団体区分:学協会

    日本物理教育学会

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  • 日本物理学会   日本物理学会第65回年次大会実行委員  

    2009年   

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    団体区分:学協会

    日本物理学会

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論文

  • Origin of magnetization in diluted magnetic semiconductor GaGdAs monolayer and superlattice 査読

    Hayato Miyagawa, Nakaba Funaki, Shyun Koshiba, NaoshiTakahashi, Yoshihiko Inada, Masaichiro Mizumaki, Naomi Kawamura, Motohiro Suzuki

    Journal of Magnetism and Magnetic Materials   476   213 - 217   2019年4月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.jmmm.2018.10.084

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  • Metamagnetic Transition of Itinerant Ferromagnet U3P4 under High Pressure 査読

    S. Araki, M. Hayashida, N. Nishiumi, H. Manabe, Y. Ikeda, T. C. Kobayashi, K. Murata, Y. Inada, P. Wisniewski, D. Aoki, Y. Onuki, E. Yamamoto, Y. Haga

    JPS Conference Proceedings   3   011081   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • NMR study of the impurity effects in noncentrosymmetric superconductors Li-2(Pd,Pt)(3)B 査読

    K. Arima, K. Matano, S. Harada, G. Z. Bao, Y. Inada, G. Q. Zheng

    10th International Conference on Materials and Mechanisms of Superconductivity (M2S-X)   449   012034-1 - 012034-3   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IOP PUBLISHING LTD  

    We report B-11 nuclear magnetic resonance (NMR) studies of the impurity effect in noncentrosymmetric superconductors Li2Pt3B and Li2Pd3B. We substitute B with Al, and find that the full width of half maximum (FWHM) of the NMR spectrum increases with increasing Al content. The superconducting transition temperature (T-c) of Li2Pt3 B1-xAlx decreases drastically with increasing non-magnetic impurity (Al) content, while it is hardly affected in Li2Pd3 B(1-x)A(l)x. These results provide new evidence for superconducting gap with line nodes in Li2Pt3B.

    DOI: 10.1088/1742-6596/449/1/012034

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  • Erratum: Magnetic phase diagram of Li<sub>2</sub>(Pd<sub>1-x</sub>Pt <sub>x</sub>)<sub>3</sub>B by ac susceptometry (Physical Review B (2011) 84 (054521)) 査読

    D.C. Peets, G. Eguchi, M. Kriener, S. Harada, S.M. Shamsuzzamen, Y. Inada, G.-Q. Zheng, Y. Maeno

    Physical Review B - Condensed Matter and Materials Physics   84 ( 5 )   2011年

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    記述言語:英語  

    DOI: 10.1103/PhysRevB.84.059908

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  • Anomalous magnetic response of CeRu2 査読

    D. Pal, S. Ramakrishnan, A. K. Grover, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

    25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 5   150   2009年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IOP PUBLISHING LTD  

    Long ago S. B. Roy and co-workers had explored the appearance of anomalous paramagnetic response in the magnetization data near the H-c2 phase boundary in samples of CeRu2. Recently, an anomalous paramagnetic response has also been demonstrated in a Borocarbide superconductor LuNi2B2C, where the phenomenon has been related to the symmetry transition of the flux line lattice. We report here the magnetization data from vibrating sample magnetometer in a single crystal of CeRu2. We demonstrate that the magnetization profile is dipolar like only at very low fields and as the applied field increases it gets drastically modified. The presence of quadrupole moment along with the dipole moment is needed to justify such a magnetization profile. We report that the quadrupole moment undergoes a large modulations near the H-c2 phase boundary. Hence, there is a possibility of response from quadrupole moment getting mixed with that from dipolar response which might lead to paramagnetic anomaly prior to H-c2.

    DOI: 10.1088/1742-6596/150/5/052206

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  • Fermi Surface, Magnetic and Superconducting Properties of LaRhIn5 and CeTIn5 (T: Co and Rh) 査読

    Hiroki Shishido, Rikio Settai, Dai Aoki, Shugo Ikeda, Shingo Araki, Miho Nakashima, Yoshihiko Inada, Yoshinori Haga, Hisatomo Harima, Yuji Aoki, Takahiro Namiki, Hideyuki Sato, Yoshichika Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   71   276 - 278   2002年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PHYSICAL SOC JAPAN  

    We have studied Fermi surface properties of LaRhIn5 and CeTIn5 (T: Co, Rh and Ir) via the de Haas-van Alphen (dlivA) experiment. These Fermi surfaces are nearly cylindrhnal, reflecting the unique tetragonal crystal structure. The cyclotron mass or the gamma value is found to be strongly field-dependent in CeCoIn5. We have also carried out the dIlvA experiment under pressure for CeRhIn5.

    DOI: 10.1143/JPSJS.71S.276

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  • Scanning tunneling microscopy and spectroscopy on cracked surfaces of superconducting CeRu(2) 査読

    H. Sakata, N. Nishida, M. Hedo, K. Sakurai, Y. Inada, Y. Onuki, E. Yamamoto, Y. Haga

    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING   72   S267 - S269   2001年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    Scanning tunneling microscopy and scanning tunneling spectroscopy measurements have been performed on a single crystal of CeRu(2) down to 2.2 K under a magnetic field up to 2.0 T. The sample surfaces for the measurements are prepared by cutting or cracking the single crystal at 4.2 K. The vortex lattice has been imaged by mapping the quasiparticle density of states at the Fermi energy on the surface. We have observed that the surface has been covered with microstructures a few nm in diameter. These microstructures are characteristic of the surface when the sample is cut or cracked at low temperature.

    DOI: 10.1007/s003390100657

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  • Electronic Property of An Antiferromagnet UGa3 査読

    D. Aoki, N. Suzuki, K. Miyake, Y. Inada, R. Settai, K. Sugiyama, E. Yamamoto, Y. Haga, Y. Onuki, H. Sugawara, H. Sato

    J. Phys. Soc. Jpn.   70   538   2000年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1143/JPSJ.70.538

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  • Investigation of superconducting gap in CeRu2 査読

    AV Moskalenko, YG Naidyuk, IK Yanson, C Geibel, M Hedo, Y Inada, Y Onuki, Y Haga, E Yamamoto

    MAGNETIC AND SUPERCONDUCTING MATERIALS, (MSM-99), VOLS A AND B   371 - 376   2000年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:WORLD SCIENTIFIC PUBL CO PTE LTD  

    We have investigated the superconducting gap of CeRu2 by point-contact spectroscopy and obtained its magnetic field dependences. Wt experiments were performed both for single iud polycrystals. We superconducting gap value is up to 30 % greater for the single crystal than in the polycrystalline CeRu2. We gap decreases almost linearly with the increasing field and vanishes at the characteristic field H-c* close to the irreversibility one. For the single crystalline sample there am some deviations from linear behaviour of the gap in the region of H-c*. Zero-bias maximum growth of differential resistance was often observed above H-c*.

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  • Fermi surface properties and de Haas–van Alphen oscillation in both the normal and superconducting mixed states of URu<inf>2</inf>Si<inf>2</inf>

    H. Ohkuni, Y. Inada, Y. Tokiwa, K. Sakurai, R. Settai, T. Honma, Y. Haga, E. Yamamoto, Y. Ōnuki, H. Yamagami, S. Takahashi, T. Yanagisawa

    Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties   79 ( 7 )   1045 - 1077   1999年7月

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    掲載種別:研究論文(学術雑誌)  

    We have succeeded in growing a high-quality single crystal of URu2Si2 with a residual resistivity ratio of 255 and performed magnetoresistance and de Haas–van Alphen (dHvA) experiments. The dHvA oscillations were observed clearly in both the normal and superconducting mixed states. From the magnetoresistance experiments, it is concluded that URu2Si2 is a compensated metal with equal carrier numbers of electrons and holes. In the dHvA experiments we observed three kinds of Fermi surfaces. We studied precisely the Fermi surface properties in both the normal and mixed states. The dHvA frequency does not change in magnitude between the normal and mixed states, while the cyclotron effective mass is reduced, and the corresponding Dingle temperature or scattering rate of the conduction electron increases in the mixed state. © 1999 Taylor and Francis Group, LLC.

    DOI: 10.1080/13642819908214859

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  • MAGNETIC, ELECTRICAL AND THERMAL-PROPERTIES OF HEAVY-FERMION SUPERCONDUCTOR UPD2AL3 査読

    N SATO, Y INADA, T SAKON, K IMAMURA, A ISHIGURO, J KIMURA, A SAWADA, T KOMATSUBARA, H MATSUI, T GOTO

    IEEE TRANSACTIONS ON MAGNETICS   30 ( 2 )   1145 - 1147   1994年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    We report experimental results of electrical resistivity, de Haas-van Alphen effect, specific heat and thermal expansion of UPd2Al3. The nominal composition is denoted by the formula of UPd2+xAl3+y. Samples with the composition of UPd2Al3.03 and UPd2.02Al3.03 reveal de Haas-van Alphen oscillations of the magnetic susceptibility. An anomaly is observed in the superconducting phase in the temperature dependence of the specific heat and thermal expansion of UPd2Al3.03. The relation between the sample quality and the appearance of the anomaly is discussed.

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書籍等出版物

  • 物理学実験

    大阪大学出版会  2003年 

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MISC

  • 「関数的な見方・考え方」を働かせた理科授業の改善に関する一考察 : 数学と理科の教科等横断的な視点から 査読

    山田 貴之, 稲田 佳彦, 岡崎 正和, 小林 辰至

    上越教育大学研究紀要   39 ( 2 )   555 - 575   2020年3月

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    記述言語:日本語   掲載種別:速報,短報,研究ノート等(大学,研究機関紀要)  

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  • Study on the Factors for Development of Scientific Thinking in Science Education

    Bulletin of Center for Teacher Education and Development, Okayama University   6   97 - 105   2016年

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  • 音と色との関わりを意識した季節感の比較表現に関する学際的授業 (冬を挟む日本の季節進行の非対称性に注目して)

    加藤内蔵進, 加藤晴子, 赤木里香子, 稲田佳彦

    環境制御   37   16 - 26   2016年

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  • 理科学習で科学的思考力を育成するために必要な条件に関する研究

    金田真弥, 川崎弘作, 稲田佳彦

    岡山大学教師教育開発センター紀要   6   97 - 105   2016年

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  • Interdisciplinary Class on Comparative Expression of the Seasonal Feeling by Interactive Activities of Art and Music (With Attention to the Asymmetric Seasonal March from Autumn to the next Spring around Japan)

    Kuranoshin Kato, Haruko Kato, Rikako Akagi, Yoshihiko Inada

    Environment Research and Control   37   16 - 26   2016年

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

    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   2015年2月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    The pressure-temperature-field phase diagram and quantum fluctuation effect were investigated in the itinerant ferromagnet U3P4 by resistivity, ac susceptibility, and Hall effect measurements under high pressure. The zero-temperature ferromagnetic-to-paramagnetic transition is located at P-c similar to 4.0 GPa. The tricritical point exists at P* = 3.8 GPa and T* = 32 K, where the ferromagnetic transition changes from second- to first-order. As a quantum fluctuation effect, the low-temperature resistivity at P-c follows T-5/3 dependence, which was theoretically described in the case of a three-dimensional ferromagnet. This result indicates that the ferromagnetic-to-paramagnetic transition at P-c may be considered as weakly first-order. Another critical behavior, the huge enhancement of rho(0) observed at P-c, cannot be interpreted as the ferromagnetic fluctuation effect. The Hall effect measurements suggest that the magnetic structure in the ordered state changes under high pressure.

    DOI: 10.7566/JPSJ.84.024705

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  • Development of a Handmade Conductivity Measurement Device for a Thin-Film Semiconductor and Its Application to Polypyrrole

    Set Seng, Tomita Shinpei, Inada Yoshihiko, Kita Masakazu

    JOURNAL OF CHEMICAL EDUCATION   91 ( 11 )   1971 - 1975   2014年11月

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    記述言語:英語   出版者・発行元:AMER CHEMICAL SOC  

    The precise measurement of conductivity of a semiconductor film such as polypyrrole (Ppy) should be carried out by the four-point probe method; however, this is difficult for classroom application. This article describes the development of a new, convenient, handmade conductivity device from inexpensive materials that can measure the conductivity of a thin-film semiconductor, Lessons on using the handmade device were conducted with high school students. The results show that the device was useful and trouble free for high school students to determine the electrical conductivity of Ppy.

    DOI: 10.1021/ed500287q

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  • 30aCM-3 LaPt_<2-x>Ge_<2+x>の超伝導と電子相図(30aCM 超伝導物質,領域8(強相関係))

    前田 賢輝, 俣野 和明, 澤岡 浩貴, 稲田 佳彦, 鄭 国慶

    日本物理学会講演概要集   69 ( 1 )   674 - 674   2014年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 30aCM-10 空間反転対称性の欠如したパリティ混合超伝導体Li_2T_3B(T:Pd,Pt)の非磁性不純物効果の異常性(30aCM 超伝導物質,領域8(強相関係))

    包 桂芝, 江口 学, 小野 晶子, 俣野 和明, 稲田 佳彦, 前野 悦輝, 市岡 優典, 鄭 国慶

    日本物理学会講演概要集   69 ( 1 )   675 - 675   2014年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 常磁性磁化率を測定する簡便な実験教材の開発

    伊丹芳徳, 稲田佳彦, 喜多雅一

    物理教育   62 ( 4 )   221 - 225   2014年

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  • Development of a simple experimental teaching material to measure the paramagnetic susceptibility

    Yoshinori Itami, Yoshihiko Inada, Masakazu Kita

    Journal of the Physics Education Society of Japan   62 ( 4 )   221 - 225   2014年

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  • B05 自作磁気天秤による遷移金属・ランタノイド化合物の磁性に関する研究

    國友 彩葉, 稲田 佳彦, 喜多 雅一

    日本理科教育学会中国支部大会研究発表要項   ( 63 )   35 - 35   2014年

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    記述言語:日本語   出版者・発行元:日本理科教育学会中国支部大会実行委員会  

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  • Influence on superconductivity in the parity mixing superconductor Li2T3B(T:Pt,Pd) by non-magnetic impurity and defect doping

    G. Bao, Y. Inada, G. Eguchi, Y. Maeno, M. Ichioka, G. -Q. Zheng

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   494   95 - 98   2013年11月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Superconductors with noncentrosymmetric crystal structures such as Li2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focused our research on non-magnetic impurity effect in Li2T3B(T:Pd,Pt). The nature of the pair breaking by non-magnetic impurity in the parity mixing superconducting state is still unclear. We prepared different quality samples of Li2Pd3B and Li2Pt3B by changing conditions in synthesizing, and sample qualities were estimated by residual resistivity. Spin singlet dominant superconductor Li2Pd3B exhibits the weak T-c suppression attributed by nonmagnetic impurity and defects, while H-c2 (0) value increased. This behavior is similar in ordinary s-wave superconductor. On the other hand, for the spin triplet dominant superconductor Li2Pt3B, it was suggested that the Cooper pair was broken and superconducting gap was decreased by non-magnetic impurities and defects. Li2Pt3B is similar to unconventional superconducting state. (C) 2013 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physc.2013.04.059

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  • 27pEB-8 LaPt_<2-x>Ge_<2+x>の結晶構造と超伝導(超伝導物質2,領域8(強相関系分野:高温超伝導,強相関f電子系など))

    前田 賢輝, 俣野 和明, 澤岡 浩貴, 稲田 佳彦, 鄭 国慶

    日本物理学会講演概要集   68 ( 2 )   568 - 568   2013年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Superconductivity in Tetragonal LaPt2-xGe2+x

    Satoki Maeda, Kazuaki Matano, Hiroki Sawaoka, Yoshihiko Inada, Guo-qing Zheng

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   82 ( 6 )   065002-1-065002-2   2013年6月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    DOI: 10.7566/JPSJ.82.065002

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  • Phonon anomaly and anisotropic superconducting gap in noncentrosymmetric Li-2(Pd1-xPtx)(3)B

    G. Eguchi, D. C. Peets, M. Kriener, S. Yonezawa, G. Bao, S. Harada, Y. Inada, G. -q. Zheng, Y. Maeno

    PHYSICAL REVIEW B   87 ( 16 )   161203-1-161203-4   2013年4月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report the systematic investigation of the specific heat of the noncentrosymmetric superconductor Li-2(Pd1-xPtx)(3)B as a function of x. There is a large deviation of the phononic specific heat from the conventional Debye specific heat for Pt-rich samples. In contrast with the fully gapped conventional behavior for small x, a power-law temperature dependence of the electronic specific heat is observed even at x = 0.5. These results manifest a strongly anisotropic or nodal superconducting gap even at x = 0.5 and a nodal superconducting gap for x greater than or similar to 0.9.

    DOI: 10.1103/PhysRevB.87.161203

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  • 29aXJ-2 空間反転対称性がない結晶構造で発現するパリティ混合超伝導体Li_2T_3B(T=Pd,Pt)の非磁性不純物効果(29aXJ 超伝導物質,領域8(強相関系:高温超伝導,強相関f電子系など))

    包 桂芝, 江口 学, 稲田 佳彦, 市岡 優典, 前野 悦輝, 鄭 国慶

    日本物理学会講演概要集   68 ( 1 )   688 - 688   2013年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 29aXJ-1 空間反転対称性の破れた超伝導体Li_2(Pd_<1-x>Pt_x)_3Bの磁場中比熱(29aXJ 超伝導物質,領域8(強相関系:高温超伝導,強相関f電子系など))

    江口 学, 包 桂芝, 原田 翔太, Peets Darre C., Kriener Markus, 稲田 佳彦, 鄭 国慶, 米澤 進吾, 前野 悦輝

    日本物理学会講演概要集   68 ( 1 )   688 - 688   2013年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 29pXB-5 遍歴強磁性体U_3P_4の圧力下メタ磁性転移(29pXB アクチノイド2(遍歴強磁性・超伝導),領域8(強相関系:高温超伝導,強相関f電子系など))

    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, 山本 悦嗣, 芳賀 芳範

    日本物理学会講演概要集   68 ( 1 )   719 - 719   2013年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 27aPS-88 空間反転対称性の無い結晶構造をもつ新強磁性体Pr_4Bi_3、Nd_4Bi_3の研究II(27aPS 領域8ポスターセッション(磁性,低温1),領域8(強相関系:高温超伝導,強相関f電子系など))

    鈴木 啓介, 本山 泰資, 包 桂芝, 稲田 佳彦, 江口 学, 米澤 進吾, 前野 悦輝

    日本物理学会講演概要集   68 ( 1 )   630 - 630   2013年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 科学的に探究する能力の育成のために自然科学研究の手順の模擬体験を取り入れた高等学校理数科用授業プログラムの開発

    岡山大学教師教育開発センター紀要   3   98 - 106   2013年

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  • Development of the Program Aimed at Training of the Scientific Research Capability for the Science and Mathematics Course in High Schools, which Include the Mock Procedure of the Natural Science Research

    Bulletin of Center for Teacher Education and Development, Okayama University   3   98 - 106   2013年

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  • PO-037 簡易四端子法による導電性プラスチックの電気抵抗(ポスター発表)

    Seng Set, 冨田 晋平, 稲田 佳彦, 喜多 雅一

    日本理科教育学会全国大会要項   ( 63 )   477 - 477   2013年

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    記述言語:日本語   出版者・発行元:日本理科教育学会  

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  • Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8

    S. Harada, J. J. Zhou, Y. G. Yao, Y. Inada, Guo-qing Zheng

    PHYSICAL REVIEW B   86 ( 22 )   220502-1-220502-5   2012年12月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and first-principles band calculations for noncentrosymmetric superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and 1). For 0 &lt;= x &lt;= 0.8, the spin-lattice relaxation rate 1/T-1 shows a clear coherence peak just below T-c, decreasing exponentially at low temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9 and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation and K-195 remains unchanged across T-c. These results indicate that the superconducting state changes drastically from a spin-singlet dominant to a spin-triplet dominant state at x = 0.8. We find that the distortion of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by band calculation. Such structure distortion that enhances the extent of inversion-symmetry breaking is primarily responsible for the pairing symmetry evolution. The insight obtained here provides a guideline for searching for noncentrosymmetric superconductors with a large spin-triplet component.

    DOI: 10.1103/PhysRevB.86.220502

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  • 20aPSA-73 空間反転対称性の無い結晶構造をもつ新強磁性体Pr_4Bi_3、Nd_4Bi_3の研究(20aPSA 領域8ポスターセッション(磁性,低温1),領域8(強相関係:高温超伝導,強相関f電子系など))

    稲田 佳彦, 鈴木 啓介, 本山 泰資, 包 桂芝

    日本物理学会講演概要集   67 ( 2 )   523 - 523   2012年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 20aPSB-50 パリティ混合超伝導体Li_2T_3B(Pt,Pd)の非磁性不純物効果による超伝導制御(20aPSB 領域8ポスターセッション(磁性,低温1),領域8(強相関係:高温超伝導,強相関f電子系など))

    包 桂芝, 江口 学, 稲田 佳彦, 前野 悦輝, 鄭 国慶

    日本物理学会講演概要集   67 ( 2 )   536 - 536   2012年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 19aGB-7 空間反転対称性の破れた超伝導体Li_2(Pd,Pt)_3Bの不純物効果およびSrPtAsのNMR/NQRによる研究(19aGB 超伝導物質1(空間反転対称性が破れた超伝導など),領域8(強相関係:高温超伝導,強相関f電子系など))

    有馬 和宏, 原田 翔太, 西窪 義博, 工藤 一貴, 野原 実, 包 桂芝, 稲田 佳彦, 俣野 和明, 鄭 国慶

    日本物理学会講演概要集   67 ( 2 )   478 - 478   2012年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 24pPSB-28 U_3P_4の高圧下ホール効果(24pPSB 領域8ポスターセッション,領域8(強相関系:高温超伝導,強相関f電子系など))

    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 恵三, Wisniewski P., 青木 大, 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 )   570 - 570   2012年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Li<sub>2</sub>(Pd<sub>1-x</sub>Pt<sub>x</sub>)<sub>3</sub>B magnetic phase diagram and superconducting parameters 査読

    D.C. Peets, G. Eguchi, M. Kriener, S. Harada, Sk.Md. Shamsuzzaman, Y. Inada, G.-Q. Zheng, Y. Maeno

    Journal of Physics: Conference Series   400 ( PART 2 )   2012年

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    記述言語:英語  

    DOI: 10.1088/1742-6596/400/2/022096

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  • NMR study of superconductors Li-2(Pd1-xPtx)(3)B and Mg10 +/- xIr19B16+y without inversion symmetry

    S. Harada, K. Tahara, Z. Li, J. L. Luo, Y. Inada, Guo-qing Zheng

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470 ( 20 )   S678 - S681   2010年12月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We report the B-11 NMR measurements in non-centrosymmetric superconductors Li-2(Pd1-xPtx)(3)B (x = 0.0, 0.2, 0.5, 1.0), Mg9.Ir19B16.7 and Mg10.5Ir19B17.1. In Li-2(Pd1-xPtx)(3)B, BCS superconducting state for x = 0-0.5 evolves into an exotic state with line nodes in the gap function for x = 1, which is attributed to the enhanced spin-orbit coupling due to heavy element Pt. In Mg9.3Ir19B16.7 and Mg10.5Ir19B17.1, Cooper pairs are predominantly in the spin-singlet state with an isotropic gap. However, in Mg10.5Ir19B17.1 the spin susceptibility remains finite even in the zero-temperature limit, which is due to the defects that enhance the spin-orbit coupling and bring about more spin-triplet component. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physc.2009.12.029

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  • NMR study of superconductors Li2(Pd1-xPtx)3B and Mg10±xIr19B16+y without inversion symmetry

    S.Harada, K. Tahara, Z. Li, J.L. Luo, Y. Inada, Guo-qing Zheng

    Physca C   470   S678 - S681   2010年12月

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  • NMR study of superconductors Li-2(Pd1-xPtx)(3)B and Mg10 +/- xIr19B16+y without inversion symmetry

    S. Harada, K. Tahara, Z. Li, J. L. Luo, Y. Inada, Guo-qing Zheng

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470   S678 - S681   2010年12月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We report the B-11 NMR measurements in non-centrosymmetric superconductors Li-2(Pd1-xPtx)(3)B (x = 0.0, 0.2, 0.5, 1.0), Mg9.Ir19B16.7 and Mg10.5Ir19B17.1. In Li-2(Pd1-xPtx)(3)B, BCS superconducting state for x = 0-0.5 evolves into an exotic state with line nodes in the gap function for x = 1, which is attributed to the enhanced spin-orbit coupling due to heavy element Pt. In Mg9.3Ir19B16.7 and Mg10.5Ir19B17.1, Cooper pairs are predominantly in the spin-singlet state with an isotropic gap. However, in Mg10.5Ir19B17.1 the spin susceptibility remains finite even in the zero-temperature limit, which is due to the defects that enhance the spin-orbit coupling and bring about more spin-triplet component. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physc.2009.12.029

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  • Evolution of the superconducting transition temperature upon a substitution of Pd by Pt in Li-2(Pd1-xPtx)(3)B (x=0-1)

    Sk Md Shamsuzzaman, Y. Inada, S. Sasano, S. Harada, Zheng Guo-qing

    INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009)   200   012183-1-012183-4   2010年

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We investigate on the evolution of the superconducting transition temperature upon a substitution of Pd by Pt in the noncentrosymmetric superconductor Li-2(Pd1-xPtx)(3)B. The spin singlet and spin triplet superconducting states can coexist in noncentrosymmetric crystal structures like Li2T3B (T=Pt, Pd), while it is prohibited in ordinary crystal structures. This study is conducted to investigate the crossover nature in Li-2(Pd1-xPtx)(3) B (x= 0-1) for obtaining information on the parity mixing. We have succeeded in synthesizing samples which have higher T-c than previous results around x=1. A lot of samples have been synthesized with different ratios of x, and we found that the value of T-c changed continuously and there was no clear discontinuity between spin singlet dominant (x similar to 0) and spin triplet dominant (x similar to 1) state in T-c value, although the x dependence of T-c is decreasing nonlinearly with the increase of x. The higher x region around x similar to 0.8 seems to be suppressed from linear behaviour.

    DOI: 10.1088/1742-6596/200/1/012183

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  • 教職研究生院専用遠程教育研究指導系統的 建構及其応用事例―以岡山大学事例―

    近藤勲, 住野好久, 黒崎東洋郎, 小野擴男, 橋ヶ谷佳正, 稲田佳彦, 笠原和彦, 中尾道子, 仲矢明孝, 山崎光洋, 渡邊淳一, 泊直希, 横山真由子

    中日教育技術学研究与発展論壇論文集   3   19 - 25   2009年

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  • 岡山大学教職大学院における新卒院生の課題発見実習とその成果に関する研究

    住野好久, 黒崎東洋郎, 小野擴男, 橋ヶ谷佳正, 稲田佳彦, 笠原和彦, 中尾道子, 仲矢明孝, 山崎光洋, 渡邉淳一, 泊直希, 横山真由子, 近藤勲

    日本教育大学協会研究年報   27   175 - 190   2009年

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  • Optical Vibronic Spectra in Reactor Neutron Irradiated alpha-Al2O3

    Rahman Abu Zayed Mohammad Saliqur, T. Awata, N. Yamashita, Y. Inada, K. Oshima, Qiu Xu, K. Atobe

    2008 INTERNATIONAL CONFERENCE ON LUMINESCENCE AND OPTICAL SPECTROSCOPY OF CONDENSED MATTER   2 ( 2 )   551 - 557   2009年

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The excitation spectra with the vibronic structure near the 360 nm absorption band and emission spectra with the vibronic structure near the 430 nm emission band have been studied comparing neutron irradiated alpha-Al2O3 at pile temperature (360 K) and at 20 K. In particular the optical vibronic emission spectra of the neutron irradiated single crystal alpha-Al2O3 in low temperature have been analyzed. Huang Rhys factors of 360 nm excitation and 430 nm emission band are calculated. Also, Debye temperature has been estimated by curve fitting using temperature dependence of the excitation band. It can be seen that the excitation band derives from F-2(+) type center and emission band is suggested as F+ type center.

    DOI: 10.1016/j.phpro.2009.07.040

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  • Nuclear Spin-Lattice Relaxation in Non-centrosymmetric Superconductors Li-2(Pd,Pt)(3)B

    M. Kandatsu, M. Nishiyama, Y. Inada, Guo-qing Zheng

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   77 ( A )   348 - 349   2008年1月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We present B-11 nuclear magnetic resonance (NMR) measurements in superconductors Li-2(Pd,Pt)(3)B without inversion symmetry. In Li2Pd3B, the spin lattice relaxation rate 1/T-1 shows a well-defined coherence peak below T-c, and follows an exponential temperature variation exp(-Delta/k(B)T) at low temperatures. At a magnetic field of 1.46 T, the energy gap Delta was found to be 1.1k(B)T(c), but it recovers to 1.5k(B)T(c) at a field of 0.44 T, which is quite close to the value 1.75k(B)T(c) for a weak coupling BCS superconductor. This behavior is in contrast to that found in Li2Pt3B where 1/T-1 is proportional to T-3, and the difference between the two compounds is ascribed to the different strength of spin orbit coupling.

    DOI: 10.1143/JPSJS.77SA.348

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  • 教職大学院生を想定した教育実習日誌の分析結果とその可視化の検討

    稲田佳彦, 住野好久, 高橋香代, 橋ヶ谷佳正, 小山朝子, 泊直希, 近藤勲

    日本科学教育学会第32回年会論文集   265-266   265 - 266   2008年

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  • 教職大学院の学部新卒者を想定した「学校における課題発見実習」の試行の一検討

    日本教育工学会研究報告集   JST08 ( 3 )   69 - 76   2008年

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  • 教職大学院専用遠隔教育研究指導システムの開発と試用結果の考察

    稲田佳彦, 住野好久, 高橋香代, 橋ヶ谷佳正, 小山朝子, 泊直希, 近藤勲

    日本教育工学会第24回全国大会講演論文集   JSET ( 24 )   251 - 252   2008年

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  • Optical Vibronic Spectra for Irradiation Induced Lattice Defect in Single Crystal a-Al2O3

    Rahman Abu Zayed, Mohammad Saliqur, T. Awata, N. Yamashita, Y. Inada, K. Oshima, Q. Xu, K. Atobe

    日本物理学会2008年秋季大会   2008年

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  • Electronic structure of LaAgSb2 and CeAgSb2 studied by high-resolution angle-resolved photoemission spectroscopy

    T. Arakane, T. Sato, S. Souma, T. Takahashi, Y. Watanabe, Y. Inada

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   310 ( 2 )   396 - 398   2007年3月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on quasi-two-dimensional rare-earth intermetallic compounds LaAgSb2 and CeAgSb2. In CeAgSb2, we found highly dispersive bands in the vicinity of the Fermi level, showing a hole-like dispersion centered at the Gamma(Z) point in the Brillouin zone. These bands produce small hole pockets at the zone center, in good agreement with the band calculation of LaAgSb2. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jmmm.2006.10.101

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  • High-quality single-crystal growth and unique electronic states in cerium and uranium compounds

    Yoshichika Onuki, Rikio Settai, Kiyohiro Sugiyama, Yoshihiko Inada, Tetsuya Takeuchi, Yoshinori Haga, Etsuji Yamamoto, Hisatomo Harima, Hiroshi Yamagami

    JOURNAL OF PHYSICS-CONDENSED MATTER   19 ( 12 )   125203 - 125217   2007年3月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We have grown many kinds of high-quality single crystals of cerium and uranium compounds and studied the Fermi surface properties via the de Haas-van Alphen experiments and energy band calculations. The quasi-two-dimensional electronic states are clarified in some compounds such as USb2, CeCoIn5, UPtGa5 and most likely UIr. In a ferromagnet CeRh3B2, we have found unique electronic states with quasi-one-dimensional character.

    DOI: 10.1088/0953-8984/19/12/125203

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  • Spin triplet superconducting state due to broken inversion symmetry in Li2Pt3B

    M. Nishiyama, Y. Inada, Guo-qing Zheng

    PHYSICAL REVIEW LETTERS   98 ( 4 )   1 - 4   2007年1月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report B-11 and Pt-195 NMR measurements in noncentrosymmetric superconductor Li2Pt3B. We find that the spin susceptibility measured by the Knight shift remains unchanged across the superconducting transition temperature T-c. With decreasing temperature (T) below T-c, the spin-lattice relaxation rate 1/T-1 decreases with no coherence peak and is in proportion to T-3. These results indicate that the Cooper pair is in the spin-triplet state and that there exist line nodes in the superconducting gap function. They are in sharp contrast to those in the isostructural Li2Pd3B which is a spin-singlet, s-wave superconductor, and are ascribed to the enhanced spin-orbit coupling due to the lack of spatial inversion symmetry. Our finding points to a new paradigm where exotic superconductivity arises in the absence of electron-electron correlations.

    DOI: 10.1103/PhysRevLett.98.047002

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  • 学習の効果は本当に積み重なっていくのか?-自覚できない学習段階がみえてきた-

    森 熊男, 稲田佳彦, 跡部鉱三, 安藤元紀, 寺澤孝文

    2006年度 学部・附属学校園相互乗り入れ授業報告   23 - 26   2007年

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  • 岡山大学大学院理科教育専攻で行った教材・授業案開発講義の試み

    稲田佳彦, 柿原聖治, 喜多雅一, 山下信彦, 石川彰彦, 小倉久和, 安藤元紀, 草地功, 加藤内蔵進, 吉岡勉, 河田有紀, 平山元士, 橋本誠治, 赤崎哲也, 東伸彦, 別役昭夫

    岡山大学教育学部教育実践センター紀要   7   1 - 8   2007年

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  • 科学的な見方や考え方を育てる指導の工夫 ー小学校理科における「エネルギー変換」の教材としての可能性ー

    高原芳明, 渡部陽平, 堀之内裕子, 金万旭, 金長善, 河田有紀, 吉岡勉, 平山元士, 稲田佳彦, 柿原聖治, 喜多雅一

    岡山大学教育学部教育実践センター紀要   7   9 - 19   2007年

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  • Electrical resistivity in SmCoIn5 under high pressure

    M.Koeda, M.Hedo,T.Fujiwara, Y.Uwatoko, T.Sadamasa, Y.Inada

    Journal of Physical Soceiety of Japan   76 ( Supple.A )   62 - 63   2007年

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  • Physical Properties and Pressure effect on TN in SmMIn5 (M=Co, Rh, Ir)

    Y. Inada, Y. Uwatoko

    ISSP Activity Report 2006   47 - 48   2007年

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  • Probing the extended non-Fermi liquid regimes of MnSi and Fe

    P Pedrazzini, D Jaccard, G Lapertot, J Flouquet, Y Inada, H Kohara, Y Onuki

    PHYSICA B-CONDENSED MATTER   378-80   165 - 166   2006年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Recent studies show that the non-Fermi liquid (NFL) behavior of MnSi and Fe spans over an unexpectedly broad pressure range, between the critical pressure p(c) and around 2p(c). In order to determine the extension of their NFL regions, we analyze the evolution of the resistivity rho(T)similar to A(p)T-n at higher pressures. We find that in MnSi the n = 3/2 exponent holds below 4.8 GPa approximate to 3p(c), but it increases above that pressure. At 7.2 GPa we observe the low-temperature Fermi liquid exponent n = 2 whereas for T &gt; 1.5 K, n =5/2. Our measurements in Fe show that the NFL behavior rho similar to T-5/3 extends at least up to 30.5 GPa, above the entire superconducting (SC) region. In the studied pressure range, the onset of the SC transition reduces by a factor 10 down to T-c(onset)(30.5 GPa) = 0.23 K, while the A-coefficient diminishes monotonically by around 50%. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.01.062

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

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

    PHYSICA B-CONDENSED MATTER   378-80   827 - 828   2006年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    CeAgSb2 crystallizes in the tetragonal ZrCuSi2 type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 mu B. Its residual resistivity steeply increases above p(c) congruent to 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb2, while similar Fermi surfaces were not observed in LaAgSb,. We have measured the anisotropy in the electrical resistivity of CexLa1-xAgSb2 to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in (CeLa1-xAgSb2)-La-x. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.01.305

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  • Physical properties of SmMIn5 (M = Co, Rh, Ir)

    Y Inada, M Hedo, T Fujiwara, T Sadamasa, Y Uwatoko

    PHYSICA B-CONDENSED MATTER   378-80   421 - 422   2006年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    SmMIn5 (M = Co, Rh, Ir) crystallizes in the tetragonal HoCoGa5-type structure. This type of crystal structure is noticed as tetragonal variants of the AuCu3-structure, in which new superconductors were discovered. PuCoGa5 and PuRhGa5 are also the interesting superconductors. On the other hand, it is expected that Sm has a ground state similar to Pu compounds. We have succeeded in growing single crystals of SmMIn5 by the flux method. SmRhIn5 and SmIrIn5 showed the antiferromagnetic ordering and extra transitions below T-N, which is almost same as the results in the previous report. We have succeeded in growing single crystals of SmCoIn5. It also showed the antiferromagnetic ordering and extra transitions below T-N = 11.9 K. The temperatures of these anomalies are 6. 7.6 and 11.9 K and lowest found in SmMIn5 compounds. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.01.148

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  • Soft x-ray absorption magnetic circular dichroism study of ferromagnetic superconductor UGe2

    T Okane, J Okamoto, K Mamiya, SI Fujimori, Y Takeda, Y Saitoh, Y Muramatsu, A Fujimori, Y Haga, E Yamamoto, A Tanaka, T Honma, Y Inada, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 2 )   2006年2月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    X-ray absorption magnetic circular dichroism (XMCD) at the U N-4.5 edges was measured for the ferromagnetic superconductor UGe2 in the normal state. The orbital and spin magneic moments deduced from the sum rule analysis of the XMCD data indicate that the U atom in UGe2 is considered to be closer to the trivalent state rather than the tetravalent state. The temperature dependence of the XMCD signal does not show any significant anomaly at T-* similar to 30K, where the resistivity anomaly was observed at ambient pressure. The XMCD measurement at the U N-2,N-3 edge indicates that the U 6d electrons have negligibly small magnetic contributions.

    DOI: 10.1143/JPSJ.75.024704

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  • Superconductivity of the ternary boride Li2Pd3B probed by B-11 NMR

    M Nishiyama, Y Inada, GQ Zheng

    PHYSICAL REVIEW B   71 ( 22 )   2005年6月

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    記述言語:英語   出版者・発行元:AMERICAN PHYSICAL SOC  

    We report a B-11 NMR measurement on the recently discovered superconductor Li2Pd3B. The nuclear spin lattice relaxation rate 1/T-1 shows a well-defined coherence peak just below T-c(H=1.46 T)=5.7 K, and the spin susceptibility measured by the Knight shift also decreases below T-c. These results indicate that the superconductivity is of conventional nature, with an isotropic gap. Our results also suggest that the p-electrons of boron and the d-electrons of palladium that hybridize with boron p-electrons are primarily responsible for the superconductivity.

    DOI: 10.1103/PhysRevB.71.220505

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  • XMCD study on ferromagnetic superconductor UGe2

    Y Inada, T Honma, N Kawamura, M Suzuki, H Miyagawa, E Yamamoto, Y Haga, T Okane, S Fujimori, Y Onuki

    PHYSICA B-CONDENSED MATTER   359   1054 - 1056   2005年4月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have performed X-ray magnetic circular dichroism (XMCD) experiments at Ge K-edge in 5f ferromagnetic superconductor UGe2(T-C = 52 K). Ge K-edge XMCD spectrum (1s -&gt; 4p) of UGe2 reflects the magnetic response of the conduction electron states. The Ge K-edge XMCD spectrum shows a main negative peak near the edge and a small positive one at 7 eV above the edge. The amplitude of this spectrum is very large in spite of being at ligand sites. The strong spin-orbit interaction at the uranium site plays an important role in this phenomenon. (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2004.01.415

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  • Fermi surface of LaRu4P12: A clue to the origin of the metal-insulator transition in PrRu4P12

    Saha, SR, H Sugawara, Y Aoki, H Sato, Y Inada, H Shishido, R Settai, Y Onuki, H Harima

    PHYSICAL REVIEW B   71 ( 13 )   2005年4月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report the de Haas-van Alphen (dHvA) effect and magnetoresistance in the filled-skutterudite superconductor LaRu4P12, which is a reference material of PrRu4P12 that exhibits a metal-insulator (M-I) transition at T-MI similar or equal to 60 K. The observed dHvA branches for the main Fermi surface (FS) are well explained by the band-structure calculation, using the full potential linearized augmented-plane-wave method with the local-density approximation, suggesting a nesting instability with q=(1,0,0) in the main multiply connected FS as expected also in PrRu4P12. Observed cyclotron effective masses of (2.6-11.8)m(0), which are roughly twice the calculated masses, indicate the large mass enhancement even in the La-skutterudites. Comparing the FS between LaRu4P12 and PrRu4P12, an essential role of c-f hybridization cooperating with the FS nesting in driving the M-I transition in PrRu4P12 is clarified.

    DOI: 10.1103/PhysRevB.71.132502

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  • 25aPS-63 RAgSb_2(T=Ce,La)の異方性(領域8ポスターセッション(f電子系等),領域8(強相関系:高温超伝導,強相関f電子系など))

    渡部 陽平, 稲田 佳彦, 日高 宏之, 小手川 恒, 小林 達生, 松田 達磨, 青木 大

    日本物理学会講演概要集   60 ( 1 )   2005年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 19pPSA-81 RAgSb_2(R=Ce, La)の電気伝導の異常とフェルミ面の研究(領域8ポスターセッション(f電子系統II),領域8(強相関系 : 高温超伝導,強相関f電子系など))

    渡部 陽平, 稲田 佳彦, 野上 由夫, 日高 宏之, 小手川 恒, 小林 達生

    日本物理学会講演概要集   60 ( 0 )   2005年

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    記述言語:日本語   出版者・発行元:一般社団法人 日本物理学会  

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  • High-resolution angle-resolved photoemission study of LaRh3B2

    Y Iida, S Souma, T Sato, T Takahashi, M Yamada, T Okubo, T Shiromoto, Y Inada, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   351 ( 3-4 )   271 - 273   2004年9月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We report high-resolution angle-resolved photoemission spectroscopy of LaRh3B2, which is a nonmagnetic reference compound of RRh3B2 (R: rare-earth metals). We found two hole-like Fermi surfaces (FSs) and two electron-like FSs centered at Gamma(A) and K(H) points, respectively. The estimated volume of FSs at Gamma(A) point shows a good agreement with the LDA band calculation, while the band dispersion and the topology of FSs at K(H) point show a remarkable disagreement. (C) 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2004.06.023

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  • High-quality single crystal growth of UGe2 and URhGe

    E. Yamamoto, Y. Haga, T. D. Matsuda, S. Ikeda, Y. Inada, R. Settai, Y. Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   E171 - E172   2004年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We searched for an experimental condition of crystal growth for a ferromagnetic superconductors of UGe2 and URhGe. Samples were prepared for both polycrystalline and single crystals, which were arc-melted and grown by the Czochralski-pulling method in a tetra-arc furnace, respectively. Annealing is an important process to enhance sample-quality, namely the residual resistivity ratio. We tried to anneal the samples under various temperatures, which were wrapped by the Ta-foil and vacuum-sealed in the quartz ample, together with the solid state electrotransport method in ultra-high vacuum. The highest residual resistivity ratio was 900 for UGe2 and 41 for URhGe. (C) 2003 Published by Elsevier B.V.

    DOI: 10.1016/j.jmmm.2003.12.1083

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  • De hass van Alphen effect of CeRhIn5 and CeCoIn5 under pressure

    H Shishido, R Settai, S Hashimoto, Y Inada, Y Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   225 - 226   2004年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have studied de Hass van Alphen (dHvA) effect under pressure for a pressure-induced superconductor CeRhIn5 and a superconductor CeCoIn5. The topology of the Fermi surface in CeRhIn5 and CeCoIn5 are found to be unchanged up to 2.1 GPa and 3.1 GPa, respectively. On the other hand, the effective mass of CeRhIn5(CeCoIn5) decreases (increases) remarkably with increasing pressure. (C) 2003 Published by Elsevier B.V.

    DOI: 10.1016/j.jmmm.2003.11.087

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  • Thermal expansion and magnetostriction in CeRh3B2

    T. Takeuchi, A. Thamizhavel, T. Okubo, M. Yamada, Y. Inada, A. Galatanu, E. Yamamoto, Y. Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272   E17 - E18   2004年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Thermal expansion and magnetostriction measurements have been performed on a single crystal CeRh3B2 with an unusually high Curie temperature T-C similar to 120 K: The thermal expansion coefficients show a weak anomaly at T-C and characteristic positive and negative peaks around 150 K for [0001] and [10(1) over bar 0], respectively. The magnetostriction at 4.2 K for the field along the basal plane is very small, with an order of 10(-5); suggesting a localized nature of Ce - 4f moments. (C) 2003 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jmmm.2003.12.1307

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  • Unconventional superconductivity and non-Fermi liquid behaviour of epsilon-iron at high pressure

    AT Holmes, D Jaccard, G Behr, Y Inada, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   16 ( 14 )   S1121 - S1127   2004年4月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We report further resistive measurements under pressure of samples of iron from multiple sources. The normal state resistivity of E-iron varied as rho(0) + AT(5/3) at low temperature over the entire superconducting pressure domain. The superconductivity could be destroyed by mechanical work, and was restored by annealing, demonstrating sensitivity to the residual resistivity rho(0). There is a strong correlation between the rho(0) and A coefficients and the superconducting critical temperature T-c. The critical field B-c2 corresponding to the maximum Tc was found to be 0.73 T, implying a coherence length of about 20 nm, i.e. slightly shorter than the electronic mean free path. Within the partial resistive transition there was a significant current dependence, with V (I) = a (I - I-0) + bI(2), and a much greater than b, possibly indicating flux-flow resistivity, even in the absence of an externally applied magnetic field.

    DOI: 10.1088/0953-8984/16/14/021

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  • Electronic, magnetic and superconducting properties of quasi-two dimensional compounds Ce2RhIn8 and La2RhIn8

    T Ueda, H Shishido, S Hashimoto, T Okubo, M Yamada, Y Inada, R Settai, H Harima, A Galatanu, E Yamamoto, N Nakamura, K Sugiyama, T Takeuchi, K Kindo, T Namiki, Y Aoki, H Sato, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   73 ( 3 )   649 - 655   2004年3月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have measured the electrical resistivity, magnetic Susceptibility, high-field magnetization, specific heat and de Haas-van Alphen (dHvA) oscillation of Ce(2)Rhln(8), together with the dHvA oscillation of La2RhIn8. In La2RhIn8 we detected three kinds of dHvA branches showing cylindrical Fermi surfaces, which are well explained by the result Of FLAPW energy band calculations. The corresponding two dHvA branches were detected in Ce2RhIn8, indicating that the topology of the Fermi surface in Ce2RhIn8 is approximately the same as that of LaRhIn8. The magnetic susceptibility and magnetization of Ce2RhIn8 were analyzed on the basis of the crystalline electric field scheme of localized-4f energy levels. Pressure-induced superconductivity was confirmed above 1.2GPa from the resistivity and ac-susceptibility measurements.

    DOI: 10.1143/JPSJ.73.649

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  • 自然科学の楽しさを伝えたい― 岡山大学サイエンス・スクールの試み―

    長屋智之, 奈良重俊, 西川亘, 山下信彦, 稲田佳彦, 味野道信, 木村吉伸

    教育フロンティア研究会資料・日本電気学会   1 - 6   2004年

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  • Unique Fermi surfaces with quasi-one-dimensional, character in CeRh3B2 and LaRh3B2

    T Okubo, M Yamada, A Thamizhavel, S Kirita, Y Inada, R Settai, H Harima, K Takegahara, A Galatanu, E Yamamoto, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 46 )   L721 - L727   2003年11月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:IOP PUBLISHING LTD  

    We have carried out de Haas-van Alphen (dHvA) experiments on a ferromagnet CeRh3B2 with an extremely high Curie temperature T-C similar or equal to 120 K and a non-4f reference compound LaRh3B2. The dHvA data of LaRh3B2 are well explained by the results of energy band calculations. The topology of the Fermi surfaces in CeRh3B2 is found to be very similar to that of LaRh3B2, possessing wavy but flat Fermi surfaces in the basal plane. Observation of a quasi-one-dimensional electronic state is the first such case in a rare earth compound.

    DOI: 10.1088/0953-8984/15/46/L02

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  • Surface superconducting state of heavy-fermion superconductor CeIrIn5 probed by CeIrIn5-Ag junctions

    T Fukui, A Sumiyama, Y Oda, Y Inada, D Aoki, H Shishido, Y Haga, Y Onuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   133 ( 3-4 )   261 - 272   2003年11月

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    記述言語:英語   出版者・発行元:SPRINGER/PLENUM PUBLISHERS  

    The CeIrIn5-Ag junctions of about 2x10(-9) cm(-2) area have been made using microfabrication techniques, and the surface superconducting state of CeIrIn5, which has two characteristic temperatures T-0 and T-c, has been investigated, where T-0 and T-c are the transition temperature to zero-resistivity state and the bulk, thermodynamic transition temperature, respectively. The temperature, below which superconducting anomalies are observed, varies from junction to junction, and yet it is always well above T-c=0.4 K. This result, together with no indication of transition at T-c, suggests that at least the surface of CeIrIn5 is in the superconducting state above T-c. The data on the critical current I-c in superconducting anomalies point to the possibility to define a local transition temperature for each junction.

    DOI: 10.1023/A:1026083124132

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  • Magnetic properties of CeNiGe2

    Y Okada, Y Inada, A Galatanu, E Yamamoto, R Settai, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   72 ( 10 )   2692 - 2693   2003年10月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    DOI: 10.1143/JPSJ.72.2692

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  • 20pPSA-16 CeRhIn_5 及び CeCoIn_5 の加圧下での dHvA 効果

    宍戸 寛明, 摂待 力生, 植田 泰輝, 橋木 信, 久保 徹雄, 稲田 佳彦, 大貫 惇睦

    日本物理学会講演概要集   58 ( 2 )   2003年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Anisotropic electrical and magnetic properties of CeTSb2 (T=Cu, Au, and Ni) single crystals

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

    PHYSICAL REVIEW B   68 ( 5 )   2003年8月

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    記述言語:英語   出版者・発行元:AMERICAN PHYSICAL SOC  

    In order to understand the anisotropic magnetic and electrical properties of ternary compounds CeTSb2 (T=Cu, Au, Ni) with the tetragonal structure, we have grown single crystals of this series by the self-flux method and measured the electrical resistivity, magnetic susceptibility, magnetization, and specific heat. CeCuSb2 and CeAuSb2 are found to order antiferromagnetically with Neel temperatures of 6.9 K and 5.0 K, respectively, while CeNiSb2 is a ferromagnet with a Curie temperature of 6.0 K with an easy axis of magnetization oriented along the [100] direction. The magnetic property of CeCuSb2 shows a very small anisotropy, whereas the electrical resistivity is highly anisotropic between Jparallel to [100] and [001]. In contrast, CeAuSb2 and CeNiSb2 show a strong anisotropy both in the magnetic and electrical measurements, although the magnetic easy axis is interchanged with respect to each other. The anisotropy in the magnetic properties has been explained on the basis of a crystalline electric-field model.

    DOI: 10.1103/PhysRevB.68.054427

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  • The de Haas-van Alphen effect in URu2Si2 under pressure

    M. Nakashima, H. Ohkuni, Y. Inada, R. Settai, Y. Haga, E. Yamamoto, Y. Onuki

    Journal of Physics Condensed Matter   15 ( 28 )   S2011 - S2014   2003年7月

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    記述言語:英語  

    We carried out a de Haas-van Alphen (dHvA) experiment under pressure on a heavy-fermion superconductor, URu2Si2. The dHvA frequency, which corresponds to a nearly spherical Fermi surface, increases slightly with increasing pressure, while the corresponding cyclotron mass decreases considerably. Neither the dHvA frequency nor the cyclotron mass exhibit any abrupt change at the critical pressure of 1.5 GPa. The present result is thus inconsistent with a recent phase-separation proposal.

    DOI: 10.1088/0953-8984/15/28/316

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  • Exotic behaviours in the Pr-based filled skutterudites

    H Sato, H Sugawara, T Namiki, Saha, SR, S Osaki, TD Matsuda, Y Aoki, Y Inada, H Shishido, R Settai, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2063 - S2070   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    The exotic features of the Pr-based filled skutterudites are reviewed based on the electronic transport properties, specific heat and de Haas-van Alphen experiments, putting the emphasis on PrFe4P12 and PrOs4Sb12. As references, the experiments on the related La- and Ce-filled skutterudites are also examined and discussed. Compared to their La reference compounds, the Fermi surface is very similar in PrOs4Sb12, suggesting the well localized character of 4f electrons, while it looks largely different in PrFe4P12. For the cyclotron effective mass, both PrFe4P12 and PrOS4Sb12 exhibit a strong enhancement, in reasonable agreement with the large specific heat coefficient.

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  • X-ray magnetic circular dichroism study of metamagnetic behaviour in the heavy-fermion system CeRu2Si2

    T Honma, N Kawamura, M Suzuki, M Mizumaki, H Maruyama, N Ishimatsu, Y Inada, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2171 - S2174   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    Ce unoccupied 5d electronic states of the nonmagnetic heavy-fermion compound CeRu2Si2 have been investigated by means of x-ray magnetic circular dichroism (XMCD) experiments. We measure the magnetic field dependences of the Ce L-2,L-3-edge XMCD of a powder sample with a transmission mode at about 2 K. The magnetic field dependence of the L-2-edge x-ray absorption spectrum shows a slight enhancement of the white line with metamagnetic behaviour, indicating reduction of the c-f hybridization. The L-2 XMCD spectrum shows a single positive lobe, while the L-3 XMCD spectrum consists of a main negative peak and two small negative satellite peaks. The main structure of CeRu2Si2 is similar to that of CeRu2Ge2.

    DOI: 10.1088/0953-8984/15/28/345

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  • High-quality single crystal growth and the Fermi surface property of uranium and cerium compounds

    Y Onuki, Y Haga, E Yamamoto, Y Inada, R Settai, H Yamagami, H Harima

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S1903 - S1909   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We present descriptions of the single crystal growth of uranium and cerium compounds via the Czochralski-pulling, self-flux and vapour transport methods. We also report the results of de Haas-van Alphen experiments and energy band calculations for a Hill-plot rule of UX3 (X: Si, Ge, Sn and Pb), heavy fermion systems of UPt3 and UPd2Al3, quasi-two-dimensional electronic states of UPtGa5, UX2 (X: Bi, Sb, As, P) and CeCoIn5, characteristic semimetals of UC and CeAgSb2, and quantum critical phenomena in UGe2 and CeRh2Si2.

    DOI: 10.1088/0953-8984/15/28/301

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  • On the unusual magnetic behaviour of CeRh(3)B(2)

    A Galatanu, E Yamamoto, T Okubo, M Yamada, A Thamizhavel, T Takeuchi, K Sugiyama, Y Inada, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2187 - S2191   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    CeRh(3)B(2) is a ferromagnet with an unexpectedly high Curie temperature and low saturation magnetic moments. The origin of its unusual magnetic behaviour remains unelucidated despite various investigations performed in the last two decades. Here we present magnetic results obtained on high-quality single crystals over a wide temperature range. Some new magnetic features are uncovered and possible approaches to explaining its magnetism are briefly discussed.

    DOI: 10.1088/0953-8984/15/28/349

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  • Magnetic properties of U(2)RhGag and U(2)FeGag

    S Ikeda, T Okubo, Y Inada, Y Tokiwa, K Kaneko, TD Matsuda, E Yamamoto, Y Haga, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2015 - S2018   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We have grown single crystals of U2FeGa8 and U2RhGa8 with the tetragonal structure by the self-flux method. Both compounds are Pauli paramagnets and possess relatively large gamma-values of 52 and 43 mJ K-2/mol U, respectively.

    DOI: 10.1088/0953-8984/15/28/317

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  • Magnetic Compton scattering study of CeRh3B2

    Y Sakurai, M Itou, J Tamura, S Nanao, A Thamizhavel, Y Inada, A Galatanu, E Yamamoto, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 28 )   S2183 - S2186   2003年7月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    The spin-polarized electron momentum distribution (magnetic Compton profile: MCP) of ferromagnetic CeRh3B2 has been measured using the magnetic Compton scattering technique at 10 K for the [1120] direction. In this compound, the orbital moment dominates the magnetization. An analysis of the MCP reveals that the Ce 4f and Ce 5d spin moments are aligned parallel with a value of -0.68 +/- 0.08 and 0.41 +/- 0.04 mu(B), respectively, while Rh 4d electrons do not carry any significant spin moment. The ratio of orbital to spin moments for Ce 4f electrons, which has been determined from comparison of the present data with recent polarized neutron diffraction data, is rather smaller than that for Ce3+ ions. This result implies strong hybridization of the Cc 4f orbital with the orbitals on the surrounding ions.

    DOI: 10.1088/0953-8984/15/28/348

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  • An anomalously huge resistivity peak under pressure in CeRhGe

    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年7月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:IOP PUBLISHING LTD  

    We have measured the electrical resistivity under pressure up to 2 GPa for an antiferromagnet, CeRhGe. The resistivity at ambient pressure decreases monotonically below a Neel temperature T-N = 10 K. With increasing pressure P, the resistivity has a peak around 10 K, which is anomalously enhanced up to 1.2 GPa. With further increasing pressure, the resistivity peak is diminished; the Neel temperature becomes zero at a critical pressure P-c = 9 GPa. The A-value of the resistivity rho in the Fermi liquid relation rho = rho(0) +AT(2) is also found to increase with increasing pressure and has a maximum at Pc which corresponds to the value for the heavy-fermion superconductor CeCu2Si2.

    DOI: 10.1088/0953-8984/15/29/102

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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

    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年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    When pressure is applied to cerium and uranium compounds, the magnetic ordering temperature is suppressed and becomes zero at a critical pressure P-c. Around P-c, non-Fermi liquid and/or superconductivity are observed. We clarified a change of the electronic state via a de Haas-van Alphen (dHvA) experiment when pressure crosses P-c. The dHvA experiment under pressure was done for the antiferromagnets CeRh2Si2 and CeRhIn5, and for a ferromagnet UGe2. We found an abrupt change of the Fermi surface for CeRh2Si2 and UGe2 when crossing P-c, indicating a first-order like phase transition. For CeRhIn5, the topology of the Fermi surface was unchanged, but the cyclotron mass increased steeply above 1.6 Gpa, where superconductivity sets in. (C) 2003 Elsevier Science B.V. All rights reserved.

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

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  • Magnetic and Fermi surface properties of UTGa5 (T : Fe, Co and Pt)

    S Ikeda, Y Tokiwa, T Okubo, M Yamada, TD Matsuda, Y Inada, R Settai, E Yamamoto, Y Haga, Y Onuki

    PHYSICA B-CONDENSED MATTER   329   610 - 611   2003年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We succeeded in growing high-quality single crystals of UTGa5 (T: Fe, Co and Pt) by the self-flux method, and measured the de Haas-van Alphen effect. With increasing the number of 3d-electrons, from Fe to Pt, the Fermi surface is found to change systematically, indicating cylindrical Fermi surfaces in UFeGa5 and UPtGa5. (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)02496-1

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  • de Haas-van Alphen effect and magnetoresistance in CeRh3B2

    Y Inada, T Ohkubo, A Thamizhavel, M Yamada, S Kirita, Y Onuki

    PHYSICA B-CONDENSED MATTER   329   595 - 596   2003年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    CeRh3B2 has the highest Curie temperature of 120 K in the cerium compounds, with a saturation moment of about 0.4mu(B)/Ce. We have succeeded in growing high-quality single crystals of CeRh3B2, and measured the de Haas-van Alphen (dHvA) effect and the transverse magnetoresistance to clarify the 4f-electronic state. The dHvA frequencies are found to be in the range from 0.4-2 kT with the cyclotron mass of 1.7-2.4m(0). The magnetoresistance suggests the existence of open orbits on the Fermi surface. (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)02482-1

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  • De Haas-van Alphen effect under pressure in URu2Si2

    M Nakashima, S Ikeda, T Okubo, Y Inada, R Settai, H Ohkuni, E Yamamoto, Y Haga, Y Onuki

    PHYSICA B-CONDENSED MATTER   329   566 - 567   2003年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We carried out the de Haas-van Alphen experiment under pressure for a heavy fermion antiferromagnet URu2Si2. The detected cyclotron mass for a nearly spherical Fermi surface under pressure changes considerably, reflecting a change of the magnetic moment. The present result is, however, inconsistent with the recent phase separated proposal. (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)02443-2

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  • Josephson effect in heavy-fermion superconductor CeTIn5 (T = Co, Ir)

    A Sumiyama, D Katayama, R Hata, Y Oda, Y Inada, D Aoki, Y Tokiwa, Y Haga, Y Onuki

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   388   545 - 546   2003年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The Josephson effect between a single crystal CeTIn5 (T = Co, Ir) and an s-wave superconductor has been investigated for CeTIn5-Cu-Nb junctions. Josephson critical current I-c is observed just below superconducting transition temperature T-c for CeCoIn5, while the temperature below which I-c appears varies from junction to junction and I-c rises gradually at first for CeIrIn5, probably reflecting a distribution of the local transition temperature in CeIrIn5, (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4534(02)02734-X

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  • De Haas-van Alphen effect of CeRhIn5 under pressure

    H Shishido, R Settai, S Araki, T Ueda, Y Inada, H Harima, Y Onuki

    PHYSICA B-CONDENSED MATTER   329   526 - 527   2003年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have studied the de Haas-van Alphen (dHvA) effect under pressure for an antiferromagnet CeRhIn5, where the antiferromagnetic state is changed into the superconducting state at higher pressures than 1.6 GPa. It is clarified from the present dHvA experiment that the topology of the Fermi surface is unchanged up to 2.1 GPa but the cyclotron mass increases strongly above 1.6 GPa. Superconductivity is found to be realized in this heavy fermion state. (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)02366-9

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  • Electrical and magnetic properties of the cerium-transition metal intermetallics CeTSb2 (T : Cu, Au, Ni)

    A Thamizhavel, T Okubo, M Yamada, A Galatanu, E Yamamoto, Y Inada, T Ebihara, Y Onuki

    PHYSICA B-CONDENSED MATTER   327 ( 2-4 )   374 - 377   2003年4月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have succeeded in growing single crystals of the cerium-transition metal intermetallics CeTSb2 (T: Cu, An, Ni) with the tetragonal structure via the self-flux method, and measured the electrical resistivity, magnetic, susceptibility, magnetization and specific heat. CeCuSb2 and CeAuSb2 are antiferromagnets with Neel temperatures of 6.9 and 5.0 K, respectively. CeCuSb2 is a heavy-fermion antiferromagnet with an electronic specific heat coefficient gamma = 200 mJ/K-2 Mol. CeAuSb2 also is a similar compound with an antiferromagnetic easy axis along the [001] direction. CeNiSb2 is a ferromagnet with a Curie temperature of 6.0 K. The easy axis is oriented along [100], with a moment of 0.6mu(B)/Ce. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)01747-7

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  • de Haas-van Alphen effect in LaRu4P12

    Saha, SR, H Sugawara, R Sakai, Y Aoki, H Sato, Y Inada, H Shishido, R Settai, U Onuki, H Harima

    PHYSICA B-CONDENSED MATTER   328 ( 1-2 )   68 - 70   2003年4月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We report the first successful observation of the de Haas van Alphen effect in the filled skutterudite LaRu4P12. Observed Fermi surfaces (FSs) are close to those expected from the band calculation. The effective mass m(c)* is roughly twice compared to the calculated band mass. Assuming the similarity of FS between LaRu4P12 and PrRu4P12, the FS nesting with q = (1, 0, 0) as a possible origin of the M-I transition in PrRu4R12 is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(02)01811-2

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  • 28aWF-10 Ce_2RhIn_8 の圧力誘起超伝導

    植田 泰輝, 宍戸 寛明, 稲田 佳彦, 摂待 力生, 並木 孝洋, 青木 勇二, 佐藤 英行, 大貫 惇睦

    日本物理学会講演概要集   58 ( 1 )   2003年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Quasi-two dimensional electronic state of the antiferromagnet UPtGa5

    S Ikeda, Y Tokiwa, Y Haga, E Yamamoto, T Okubo, M Yamada, N Nakamura, K Sugiyama, K Kindo, Y Inada, H Yamagami, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   72 ( 3 )   576 - 581   2003年3月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have carried out the de Haas-van Alphen (dHvA) experiment to clarify the Fermi surface property of an antiferromagnet UPtGa5. and have constructed the magnetic phase diagram from the high-field magnetization measurement. From the dHvA experiment. the Fermi surface is found to consist of four kinds of nearly cylindrical Fermi surfaces along the tetragonal 1001] direction. which are approximately explained by the result of the spin-polarized energy band calculations based on the antiferromagnetic structure with a sequence of (up arrowdown arrow) along [001]. Relatively large cyclotron masses are detected for carriers of the corresponding Fermi surfaces, ranging from 10 to 24 m(o) (m(o): rest mass of an electron). 5f electrons are thus concluded to be itinerant and also to contribute to the magnetic moment at the uranium sites.

    DOI: 10.1143/JPSJ.72.576

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

    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年2月

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    記述言語:英語   出版者・発行元:JAGIELLONIAN UNIV PRESS  

    When pressure is applied to the cerium and uranium compounds, their magnetic ordering temperatures are suppressed and become zero at a critical pressure P-c. Around P-c non-Fermi liquid and/or superconductivity are observed. We clarified a change of the electronic state via the de Haas-van Alphen (dHvA) experiment when pressure crosses P-c. The dHvA experiment under pressure was done for antiferromagnets CeRh2Si2, CeRhIn5 and URu2Si2, and a ferromagnet UGe2. We find an abrupt change of the Fermi surface for CeRh2Si2 and UGe2 when crossing P-c, indicating a first-order like phase transition. For CeRhIn5 and URu2Si2, a change of the cyclotron mass is clearly observed.

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  • Single crystal growth and annealing temperature of ferromagnetic URhGe

    E Yamamoto, Y Haga, TD Matsuda, Y Inada, R Settai, Y Tokiwa, Y Onuki

    ACTA PHYSICA POLONICA B   34 ( 2 )   1059 - 1062   2003年2月

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    記述言語:英語   出版者・発行元:ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS  

    We searched for an experimental condition of crystal growth for a ferromagnetic superconductor URhGe. Samples were prepared for both poly-crystalline and single crystals, which were arc-melted and grown by the Czochralski-pulling method in a tetra-arc furnace, respectively. Annealing is an important process in order to increase sample-quality, namely the residual resistivity ratio. We tried to anneal the samples under various temperatures, which were wrapped by the Ta-foil and vacuum-sealed in the quartz ample, together with the solid state electrotransport (SSE) method in ultra-high vacuum.

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  • Huge residual resistivity in the quantum critical region of CeAgSb2

    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年2月

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    記述言語:英語   出版者・発行元:IOP PUBLISHING LTD  

    We have studied the effect of pressure on the electrical resistivity of a high-quality single crystal CeAgSb2 which has a small net ferromagnetic moment of 0.4 mu(B)/Ce. The magnetic ordering temperature. T-ord = 9.7 K decreases with increasing pressure p and disappears at a critical pressure p(c) similar or equal to 3.3 GPa. The residual resistivity, which is close to zero up to 3 GPa, increases steeply above 3 GPa, reaching 55 muOmega cm at p(c). A huge residual resistivity is found to appear when the magnetic order disappears.

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

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  • Anisotropic, thermal, and magnetic properties of CeAgSb2: Explanation via a crystalline electric field scheme

    T Takeuchi, A Thamizhavel, T Okubo, M Yamada, N Nakamura, T Yamamoto, Y Inada, K Sugiyama, A Galatanu, E Yamamoto, K Kindo, T Ebihara, Y Onuki

    PHYSICAL REVIEW B   67 ( 6 )   2003年2月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We have studied the thermal and magnetic properties of a single crystal of CeAgSb2, which has a small net magnetic moment of about 0.4mu(B) below the ordering temperature T-ord=9.7 K, by means of specific heat, thermal expansion, and magnetization measurements. The magnetic part of the specific heat shows a broad peak around 30 K, and the magnetic entropy reaches R ln 4 at about 50 K. This indicates that the first excited doublet is situated at about 50 K from the ground state. In addition, the thermal expansion along the tetragonal [001] direction exhibits a clear negative peak around 25 K, which is also attributed to the magnetic excitations between crystalline electric field (CEF) states. These data, together with the anisotropic magnetic susceptibility, were analyzed on the basis of a CEF model, and splitting energies from the ground state to the first and second excited states were estimated to be 48 and 140 K, respectively. Furthermore, the anisotropy in the high-field magnetization was well explained by the present CEF model with the same parameters, where the saturation moment for Hparallel to [001] is found to be determined by the value of g(J)J(z) of the ground state.

    DOI: 10.1103/PhysRevB.67.064403

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  • Anisotropic, thermal, and magnetic properties of CeAgSb2: Explanation via a crystalline electric field scheme

    T Takeuchi, A Thamizhavel, T Okubo, M Yamada, N Nakamura, T Yamamoto, Y Inada, K Sugiyama, A Galatanu, E Yamamoto, K Kindo, T Ebihara, Y Onuki

    PHYSICAL REVIEW B   67 ( 6 )   2003年2月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We have studied the thermal and magnetic properties of a single crystal of CeAgSb2, which has a small net magnetic moment of about 0.4mu(B) below the ordering temperature T-ord=9.7 K, by means of specific heat, thermal expansion, and magnetization measurements. The magnetic part of the specific heat shows a broad peak around 30 K, and the magnetic entropy reaches R ln 4 at about 50 K. This indicates that the first excited doublet is situated at about 50 K from the ground state. In addition, the thermal expansion along the tetragonal [001] direction exhibits a clear negative peak around 25 K, which is also attributed to the magnetic excitations between crystalline electric field (CEF) states. These data, together with the anisotropic magnetic susceptibility, were analyzed on the basis of a CEF model, and splitting energies from the ground state to the first and second excited states were estimated to be 48 and 140 K, respectively. Furthermore, the anisotropy in the high-field magnetization was well explained by the present CEF model with the same parameters, where the saturation moment for Hparallel to [001] is found to be determined by the value of g(J)J(z) of the ground state.

    DOI: 10.1103/PhysRevB.67.064403

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  • Quasi-2D fermi surfaces of the magnetic compound CeAgSb2

    Y Inada, A Tamizabel, Y Sawai, S Ikeda, H Shishido, T Okubo, M Yamada, Y Onuki, T Ebihara

    ACTA PHYSICA POLONICA B   34 ( 2 )   1141 - 1144   2003年2月

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    記述言語:英語   出版者・発行元:ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS  

    We have succeeded in growing high-quality single crystals of CeAgSb2, and carried out the de Haas-van Alphen (dHvA) experiment. Cylindrical Fermi surfaces were observed, together with closed Fermi suraces. The effective cyclotron mass is in the range from 0.9 to 32m(0). Large cylindrical Fermi surfaces occupying half of the Brillouin zone were detected, which are highly different from small Fermi surfaces in the reference compounds LaAgSb2 and YAgSb2 with a semimetalic character. CeAgSb2 is the first example in which the 4f electron becomes itinerant and possesses the magnetic moment.

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  • De Haas-Van Alphen effect in heavy fermion superconductor PrOs4Sb12

    H.Sugawara, S.Osaki, S.R.Saha, Y. Aoki, H.Sato, Y. Inada, H.Shishido, R. Settai, Y. Onuki

    ACTA PHYSICA POLONICA B   2003年

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  • Rare earth and uranium compounds: UX2, CeTIn5, UTGa5

    Y. Onuki, D. Aoki, P. Wisniewski, H. Shishido, S. Ikeda, Y. Inada, R. Settai, Y. Tokiwa, E. Yamamoto, Y. Haga, T. Maehira, H. Harima, M. Higuchi, A. Hasegawa, H. Yamagami

    Acta Physica Polonica B   2003年

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  • An unusual hollow cylindrical Fermi surface of a quasi-two-dimensional compound CeAgSb2

    Y Inada, A Thamizhavel, H Yamagami, T Takeuchi, Y Sawai, S Ikeda, H Shishido, T Okubo, M Yamada, K Sugiyama, N Nakamura, T Yamamoto, K Kindo, T Ebihara, A Galatanu, E Yamamoto, R Settai, Y Onuki

    PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES   82 ( 18 )   1867 - 1892   2002年12月

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    記述言語:英語   出版者・発行元:TAYLOR & FRANCIS LTD  

    We have carried out the de Haas-van Alphen (dHvA) experiment, together with electrical resistivity, magnetic susceptibility, magnetization and specific heat experiments on a high-quality single-crystal CcAgSb(2), which has a small net ferromagnetic moment of 0.4 mu(B) per Cc atom. The bulk magnetic properties are well explained by the crystalline electric field scheme. On the other hand, large dHvA frequencies of 10(8) Oe, which correspond to cylindrical Fermi surfaces, were detected by the dHvA measurement for the magnetic field along the tetragonal [001] direction, indicating the quasi-two-dimensional electronic structure. The dHvA branches of CeAgSb2 are highly different from those with small dHvA frequencies of 10(7) Oe for the reference compounds LaAgSb2 and YAgSb2 which exhibit a semimetallic character. The dHvA results have been compared with the results of the energy band calculations. It was concluded that the 4f electron is mainly localized and that the Fermi surface of CeAgSb2 is similar to that of LaAgSb2, but it is slightly enlarged so as to form the large orbits along a hollow cylindrical Fermi surface.

    DOI: 10.1080/1364281021000036823

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  • Fermi surface of the heavy-fermion superconductor PrOs4Sb12

    H Sugawara, S Osaki, Saha, SR, Y Aoki, H Sato, Y Inada, H Shishido, R Settai, Y Onuki, H Harima, K Oikawa

    PHYSICAL REVIEW B   66 ( 22 )   2002年12月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We have investigated the de Haas-van Alphen effect in the Pr-based heavy-fermion superconductor PrOs4Sb12. The topology of Fermi surface is close to the reference compound LaOs4Sb12 and well explained by the band-structure calculation based on the FLAPW (full potential linearized augmented-plane-wave)-LDA (local-density approximation) +U method, where the 4f electrons are localized. We have confirmed a highly enhanced cyclotron effective mass (2.4-7.6)m(0), which is apparently large compared to the usual Pr-based compounds.

    DOI: 10.1103/PhysRevB.66.220504

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

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

    PHYSICAL REVIEW B   66 ( 21 )   2002年12月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    Evolution of the pressure-induced heavy fermion state and superconductivity in CeRhIn5 have been established by high-pressure Fermi surface studies using dHvA technique. The effective mass of the conduction electrons named branch beta(2) increases from 5.5 m(0) at ambient pressure to 20 m(0) at 1.6 GPa where superconductivity sets in. This heavy electron mass continues to increase steeply up to 2.1 GPa, 45 m(0) at 2.1 GPa, with a concomitant increase of the superconducting transition temperature. However, the underlying Fermi surface remains approximately same even at 2.1 GPa, strongly suggesting that antiferromagnetic fluctuations of Ce moments do not contribute to the volume of the Fermi surface, but enhance the cyclotron mass of the conduction electrons.

    DOI: 10.1103/PhysRevB.66.214510

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  • Exotic heavy-fermion state in the filled skutterudite PrFe4P12 uncovered by the de Haas-van Alphen effect

    H Sugawara, TD Matsuda, K Abe, Y Aoki, H Sato, S Nojiri, Y Inada, R Settai, Y Onuki

    PHYSICAL REVIEW B   66 ( 13 )   2002年10月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report the de Haas-van Alphen (dHvA) experiment on the filled skutterudite PrFe4P12 exhibiting apparent Kondo-like behaviors in the transport and thermal properties. We have found enormously enhanced cyclotron effective mass m(c)(*)=81 m(0) in the high field phase, which indicates that PrFe4P12 is the first Pr compound in which really heavy mass has been unambiguously confirmed. Also in the low field nonmagnetic ordered phase (LOP), we observed the dHvA branch with m(c)(*)=10 m(0) that is quite heavy taking into account its small Fermi surface volume (0.15% of the Brillouin zone size). The insensitivity of mass in LOP against the magnetic field suggests that the quadrupolar interaction plays a main role both in the mass renormalization and the LOP formation.

    DOI: 10.1103/PhysRevB.66.134411

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  • 6aPS-47 URhGe単結晶育成と物性II(4f・5f電子系,重い電子系,遷移金属酸化物,領域8)

    山本 悦嗣, 芳賀 芳範, 松田 達磨, 常盤 欣文, 稲田 住彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   2002年8月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 6aPS-10 GeNiGe2の単結晶育成と物性(4f・5f電子系,重い電子系,遷移金属酸化物,領域8)

    岡田 康明, 植田 泰輝, 稲田 佳彦, ガラタヌ アンドレイ, 山本 悦嗣, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   2002年8月

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  • 6aPS-16 CeIrIn5における二つの超伝導転移(4f・5f電子系,重い電子系,遷移金属酸化物,領域8)

    福井 亨, 住山 昭彦, 中川 雅仁, 小田 祺景, 稲田 佳彦, 青木 大, 常盤 欣文, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   431 - 431   2002年8月

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  • 9pXC-7 CeRhIn5とCe2RhIn8の加圧下でのdHvA効果(重い電子系(超伝導,その他),領域8)

    宍戸 寛明, 荒木 新吾, Galatanu A., 松田 達磨, 山本 悦嗣, 中島 美帆, 植田 泰輝, 池田 修悟, 橋本 信, 稲田 佳彦, 接待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   544 - 544   2002年8月

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  • 6aPS-7 CeAgSb2の量子臨界点近傍での電気抵抗(4f・5f電子系,重い電子系,遷移金属酸化物,領域8)

    桐田 仲悟, 浅井 理人, 中島 美帆, Arumugamu Thamizhavel, 小林 達生, 海老原 孝雄, 稲田 佳彦, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   429 - 429   2002年8月

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  • 6aWB-2 磁気コンプトン散乱による強磁性CeRh_3B_2の研究(化合物磁性・f電子系,領域3)

    櫻井 吉晴, 伊藤 真義, 田村 純平, 七尾 進, Thamizhavel A., 桐田 伸悟, 稲田 佳彦, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   326 - 326   2002年8月

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  • 6pXC-10 dHvA Effect in LaRu4P12

    Saha S.R, Sugawara H, Sakai R, Aoki Y, Sato H, Inada Y, Shishido H, Settai R, Onuki Y, Harima H

    日本物理学会講演概要集   57 ( 2 )   466 - 466   2002年8月

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  • 6pXC-4 PrOs4Sb12のドハース・ファンアルフェン効果(重い電子系(スクッテルダイト),領域8)

    菅原 仁, 大崎 舟司, SAHA S.R, 青木 勇二, 佐藤 英行, 稲田 佳彦, 宍戸 寛明, 摂待 力生, 大貫 惇睦, 播磨 尚朝

    日本物理学会講演概要集   57 ( 2 )   465 - 465   2002年8月

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  • 6aPS-9 Electrical and Magnetic Properties of CeTSb2(T=Au,Cu and Ni) Single Crystals

    Thamizhavel A., Kirita S., Okuda Y., Inada Y., Ebihara T., Yamamoto E., Galatanu A., Onuki Y.

    日本物理学会講演概要集   57 ( 2 )   429 - 429   2002年8月

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  • 6aPS-44 UPtGa5のドハース・ファンアルフェン効果(4f・5f電子系,重い電子系,遷移金属酸化物,領域8)

    池田 修悟, 常盤 欣文, 大久保 智幸, 稲田 佳彦, 摂待 力生, 山本 悦嗣, 芳賀 芳範, 山上 浩志, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   438 - 438   2002年8月

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  • 9aXC-8 CeAgSb2の磁性と強磁場磁化(重い電子系,(近藤半導体,セリウム系),領域8)

    杉山 清寛, 山本 武史, 中村 仁子, ガラタヌ アンドレイ, タミザベル アルムガム, 稲田 佳彦, 金道 浩一, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   538 - 538   2002年8月

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  • 9axC-11 CeRh3B2のドハース・ファンアルフェン効果と磁気抵抗(重い電子系,(近藤半導体,セリウム系),領域8)

    大久保 智幸, 山田 美音子, 桐田 伸悟, Thamizhavel A., Galatanu A., 山本 悦嗣, 稲田 佳彦, 摂待 力生, 人貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   538 - 538   2002年8月

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  • 9aXC-7 CeAgSb2とLaAgSb2のフェルミ面(重い電子系,(近藤半導体,セリウム系),領域8)

    稲田 佳彦, タミザベル アルムガム, 山上 浩志, 大久保 智幸, 山田 美音子, 池田 修悟, 宍戸 寛明, ガラタノ アンドレ, 山本 悦嗣, 海老原 孝, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   537 - 537   2002年8月

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  • 9aXC-12 CeRh3B2の圧力下電気抵抗(重い電子系,(近藤半導体,セリウム系),領域8)

    村松 孝樹, 清水 克哉, 小林 達生, タミザベル アルムガム, 桐田 伸悟, 大久保 智幸, 山田 美音子, 稲田 佳彦, 大貫 惇睦

    日本物理学会講演概要集   57 ( 2 )   539 - 539   2002年8月

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  • Superconductivity of epsilon-Fe: complete resistive transition

    D Jaccard, AT Holmes, G Behr, Y Inada, Y Onuki

    PHYSICS LETTERS A   299 ( 2-3 )   282 - 286   2002年7月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Last year. iron was reported. to become superconducting at temperatures., below 2 K and pressures between 15 and 30 GPa, Nature 412 (2001) 316. The evidence presented was a weak resistivity drop, suppressed by a magnetic field above 0.2 T. and a small Meissner Signal. However, a compelling demonstration, such as the occurrence of zero resistance, was lacking. Here we report the measurement of a complete resistive transition at 22.2 GPa with an onset slightly above 2 K in two very pure samples of iron, of different origins. The superconductivity appears unusually sensitive to disorder, developing only when (lie electronic mean free path is above a threshold value, while the normal state resistivity is characteristic of a nearly ferromagnetic metal. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0375-9601(02)00725-9

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  • Pressure study of an antiferromagnet, CeMg2Cu9

    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年4月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:IOP PUBLISHING LTD  

    We have studied the effect of pressure on the electrical resistivity of the antiferrornagnet CeMg2Cu9 which crystallizes in the hexagonal structure. The structure is built up of alternating MgCu2 Laves-type and CeCu5-type layers along the [0001] direction. The Neel temperature T-N = 2.7 K at ambient pressure decreases with increasing pressure p and disappears at a critical pressure p(e) similar or equal to 2.5 GPa. Correspondingly, the residual resistivity rho(0) and the coefficient A in a Fermi-liquid relation rho = rho(0) + AT(2) are found to have maximum values around p(e).

    DOI: 10.1088/0953-8984/14/14/101

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  • 24aPS-75 URhSiの磁性(24aPS 4f・5f電子系,重い電子系,領域8(強相関系分野-高温超伝導,強相関f電子系など))

    大久保 智幸, 池田 修悟, 松田 達磨, 山本 悦嗣, 稲田 佳彦, 摂待 力生, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   2002年3月

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  • 24aPS-73 URhGe単結晶育成と物性(24aPS 4f・5f電子系,重い電子系,領域8(強相関系分野-高温超伝導,強相関f電子系など))

    山本 悦嗣, 芳賀 芳範, 松田 達磨, 常盤 欣文, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   2002年3月

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  • 24aPS-15 CeNiIn_4の磁性(24aPS 4f・5f電子系,重い電子系,領域8(強相関系分野-高温超伝導,強相関f電子系など))

    植田 泰輝, 宍戸 寛明, 稲田 佳彦, 芳賀 芳範, 竹内 徹也, 鳴海 康雄, 中村 仁子, 並木 孝洋, 青木 勇二, 佐藤 英行, 杉山 清寛, 金道 浩一, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   2002年3月

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  • 24pWA-9 Ce化合物の加圧下での電気抵抗(24pWA 重い電子系(超伝導),領域8(強相関系分野-高温超伝導,強相関f電子系など))

    稲田 佳彦, アルムガム タミザベル, 山田 美音子, 沢井 祥束, 中脇 宙一, 浅井 理人, 桐田 伸悟, 宍戸 寛明, 植田 泰輝, 中島 美帆, 小林 達夫, 摂待 力生, 海老原 孝雄, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   2002年3月

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  • 24aPS-13 Hydrostatic pressure dependence of Curie temperature in the Kondo lattice compound CeAgSb_2

    Thamizhavel A., Ebihara T., Kirita S., Asai R., Inada Y., Settai R., Onuki Y.

    日本物理学会講演概要集   57 ( 1 )   476 - 476   2002年3月

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  • 27aWB-4 CeMg_2Cu_gの圧力下の物性(27aWB 重い電子系(非フェルミ液体),領域8(強相関系分野-高温超伝導,強相関f電子系など))

    浅井 理人, 中脇 宙一, 中島 美帆, 荒木 新吾, 池田 修悟, 沢井 祥束, 桐田 伸悟, 山田 美音子, 藤原 旅人, 小林 達生, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   579 - 579   2002年3月

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  • 24aPS-12 重い電子系超伝導体のトンネル効果(24aPS 4f・5f電子系,重い電子系,領域8(強相関系分野-高温超伝導,強相関f電子系など))

    福井 亨, 畑 倫平, 住山 昭彦, 中川 雅仁, 小田 祺景, 稲田 佳彦, 青木 大, 常盤 欣文, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   476 - 476   2002年3月

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  • 27pWB-2 URu_2Si_2の圧力下でのドハース・ファンアルフェン効果(27pWB 5f電子系(隠れた秩序,圧力誘起超伝導,5f磁性,フェルミ面),領域8(強相関系分野-高温超伝導,強相関f電子系など))

    中島 美帆, 池田 修吾, 大久保 智幸, 大國 仁, 稲田 佳彦, 芳賀 芳範, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   590 - 590   2002年3月

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  • 24aPS-76 UTGa_5及びU_2TGa_8(T:遷移金属)の物性(24aPS 4f・5f電子系,重い電子系,領域8(強相関系分野-高温超伝導,強相関f電子系など))

    池田 修悟, 常盤 欣文, 大久保 智幸, 宍戸 寛明, 稲田 佳彦, 摂待 力生, 山本 悦嗣, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   491 - 491   2002年3月

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  • 27pWB-6 圧力下でのU_3P_4の強磁性 : 常磁性転移(27pWB 5f電子系(隠れた秩序,圧力誘起超伝導,5f磁性,フェルミ面),領域8(強相関系分野-高温超伝導,強相関f電子系など))

    赤澤 輝彦, 武田 圭生, 田中 雅士, 小林 達生, 清水 克哉, 天谷 喜一, 稲田 佳彦, ピョートル ウィシイニュフスキー, 青木 大, 山本 悦嗣, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   591 - 591   2002年3月

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  • 24pwA-2 CeRhIn_5の加圧下でのdHvA効果(24pWA 重い電子系(超伝導),領域8(強相関系分野-高温超伝導,強相関f電子系など))

    穴戸 寛明, 荒木 新吾, 中島 美帆, 植田 泰輝, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   57 ( 1 )   493 - 493   2002年3月

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  • de Haas-van Alphen effect on PrRu4Sb12

    TD Matsuda, K Abe, F Watanuki, H Sugawara, Y Aoki, H Sato, Y Inada, R Settai, Y Onuki

    PHYSICA B-CONDENSED MATTER   312   832 - 833   2002年3月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The angular dependence of de Haas-van Alphen effect has been measured to reveal the electronic structure of filled skutterudite PrRu4Sb12. The angular dependence of de Haas-van Alphen frequency of PrRu4Sb12 is in good agreement with that of LaRu4Sb12. Compared with PrFe(4)Pi(12), no anomalous enhancement of cyclotron effective mass has been observed in this system. This change of electronic structure is attributed to the difference in the c - f hybridization strength, which is expected from the large difference in the lattice parameters. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(01)01260-1

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  • De Haas-van Alphen effect in UIr

    Etsuji Yamamoto, Yoshinori Haga, Hiroaki Shishido, Hirokazu Nakawaki, Yoshihiko Inada, Rikio Settai, Yoshichika Onuki

    Physica B: Condensed Matter   312-313   302 - 303   2002年3月

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    記述言語:英語  

    We have succeeded in growing a high-quality single crystal of UIr with the monoclinic structure by the Czochralski pulling method in a tetra-arc furnace. UIr is a ferromagnetic compound. Its Curie temperature TC is 46K and the magnetic moment is found to be oriented along the [1 0 1̄] direction by the magnetization measurement. The magnetic moment is 0.5 μB/U. We have observed the de Haas-van Alphen oscillation. All the detected branches have heavy cyclotron effective masses ranging from 9.6 to 32 m0. They are consistent with the electronic specific heat coefficient γ = 48.5 mJ/K2 mol. © 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(01)01331-X

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  • Exotic heavy-fermion state in the filled skutterudite (formula presented) uncovered by the de Haas-van Alphen effect

    H. Sugawara, T. D. Matsuda, K. Abe, Y. Aoki, H. Sato, S. Nojiri, Y. Inada, R. Settai, Y. Ōnuki, Y. Ōnuki

    Physical Review B - Condensed Matter and Materials Physics   66   1 - 5   2002年1月

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    We report the de Haas-van Alphen (dHvA) experiment on the filled skutterudite (formula presented) exhibiting apparent Kondo-like behaviors in the transport and thermal properties. We have found enormously enhanced cyclotron effective mass (formula presented) in the high field phase, which indicates that (formula presented) is the first Pr compound in which really heavy mass has been unambiguously confirmed. Also in the low field nonmagnetic ordered phase (LOP), we observed the dHvA branch with (formula presented) that is quite heavy taking into account its small Fermi surface volume (0.15% of the Brillouin zone size). The insensitivity of mass in LOP against the magnetic field suggests that the quadrupolar interaction plays a main role both in the mass renormalization and the LOP formation. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevB.66.134411

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

    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年1月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have studied Fermi surface properties of LaRhIn5 and CeTIa(5) (T: Co, Rh and Ir) via the de Haasvan Alphen (dHvA) experiment. The Fermi surface of a non-4f reference compound LaRhIn5 is quasi-two dimensional, reflecting the unique tetragonal crystal structure, which is consistent with the result of FLAWP energy band calculations. The Fermi surface of an antiferromagnet CeRhIn5 is similar to that of LaRhIn5 although the cyclotron mass in CeRhIn5 is roughly by one order larger than that in LaRhIn5. Both Fermi surfaces are. however, different from those of CeCoIn5 and CcIrIn(5) which are well explained by the 4f-itinerant band model. The 4f electrons in CeRhIn5 thus do not contribute to the volume of ate Fermi surface. We have also studied magnetic and superconducting properties of CeCoIn5 and CeIrIn5.

    DOI: 10.1143/JPSJ.71.162

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  • Magnetic and Fermi Surface Properties of UCoGa5 and URhGa5

    S. Ikeda, Y. Tokiwa, T. Okubo, Y. Haga, E. Yamamoto, Y. Inada, R. Settai, Y. Onuki

    J. Nuclear Science and Technology   2002年

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  • 5f-itinerant Antiferromagnetism and Fermi surface property in UGa3, UFeGa5, UNiGa5 and UPtGa5

    Yoshichika Ōnuki, Yoshihumi Tokiwa, Shugo Ikeda, Dai Aoki, Yoshihiko Inada, Rikio Settai, Takahiro Maehira, Etsuji Yamamoto, Yoshinori Haga

    Journal of Nuclear Science and Technology   39   114 - 117   2002年

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    記述言語:英語  

    We measured the magnetic susceptibilityand de Haas-van Alphen (dHvA) oscillation in UGa3 and UTGa5 (T: Fe, Ni andPt). The susceptibility in UGa3 and UTGa5 is almost temperature-independent. It does not follow the Curie-Weiss law in the paramagnetic region, being dominated by a Pauli-like contribution, although UGa3 and UTGa5 (T: Ni and Pt) order antiferro-magnetically. The electronic state in UTGa5 is unique, indicating quasi-two dimensionality. Nearly cylindrical Fermi surfaces are formed by itinerant-5f electrons. © 2014 Taylor and Francis Group, LLC.

    DOI: 10.1080/00223131.2002.10875421

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  • Magnetic-nonmagnetic transition of U3P4 at high pressures

    K. Takeda, M. Tanaka, T. C. Kobayashi, T. Akazawa, K. Shimizu, K. Amaya, Y. Inada, P. Wisniewski, D. Aoki, E. Yamamoto, Y. Haga, Y. Onuki

    J. Nuclear Science and Technology   2002年

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  • Observation of the Josephson effect in the heavy-fermion superconductor CeIrIn5 above T-c

    A Sumiyama, D Katayama, Y Oda, Y Inada, D Aoki, Y Tokiwa, Y Haga, Y Onuki

    JOURNAL OF PHYSICS-CONDENSED MATTER   13 ( 42 )   L879 - L884   2001年10月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:IOP PUBLISHING LTD  

    The Josephson effect for a heavy-fermion superconductor CeIrIn5, which has two characteristic temperatures T-0 and T-c, has been investigated for CeIrIn5-Cu-Nb junctions, where T-0 and T-c are the temperature of the transition to the zero-resistivity state and the bulk, thermodynamic transition temperature, respectively. For all the junctions fabricated on the (110) and (001) planes of CeIrIn5, the temperature below which the Josephson effect is observed is near T-0 = 0.8 K and much higher than T-c = 0.3 K. This result suggests that at least the surface of CeIrIn5 is in a superconducting state below T-0, in which phase coherence between CeIrIn5 and Nb is possible.

    DOI: 10.1088/0953-8984/13/42/102

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  • Quasi-two dimensional Fermi surfaces in rare earth and uranium compounds: UX2, CeTIn5 and UTGa5

    Y Onuki, D Aoki, P Wisniewski, H Shishido, S Ikeda, Y Inada, R Settai, Y Tokiwa, E Yamamoto, Y Haga, T Maehira, H Harima, M Higuchi, A Hasegawa, H Yamagami

    ACTA PHYSICA POLONICA B   32 ( 10 )   3273 - 3289   2001年10月

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    記述言語:英語   出版者・発行元:JAGIELLONIAN UNIV PRESS  

    We present the quasi-two dimensional Fermi surface studies in rare earth and uranium compounds such as UX2 (X: Bi, Sb, As and P) and RTIn5 (R: rare earth, T: Co, Rh and Ir), together with UTGa5. The present quasi-two dimensionality is closely related to the magnetic unit cell and/or the unique crystal structure elongated along the tetragonal [001] direction, which bring about a flat Brillouin zone and produce cylindrical but highly corrugated Fermi surfaces along [001].

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  • Possible nodal vortex state in CeRu<inf>2</inf>

    R. Kadono, W. Higemoto, A. Koda, K. Ohishi, T. Yokoo, J. Akimitsu, M. Hedo, Y. Inada, Y. Onuki, E. Yamamoto, Y. Haga

    Physical Review B - Condensed Matter and Materials Physics   63   2245201 - 22452016   2001年8月

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    The microscopic property of magnetic vortices in the mixed state of a high-quality CeRu2 crystal has been studied by muon spin rotation. We have found that the spatial distribution of magnetic induction B(r) probed by muons is perfectly described by the London model for the triangular vortex lattice with appropriate modifications to incorporate the high-field cutoff around the vortex core and the effect of long-range defects in the vortex lattice structure at lower fields. The vortex core radius is proportional to H(β-1)/2 with β≃0.53 (H being the magnetic field), which is in good agreement with the recently observed nonlinear field dependence of the electronic specific heat coefficient γ∝Hβ. In particular, the anomalous increase of magnetic penetration depth in accordance with the peak effect in dc magnetization (≥H*≃3 T at 2.0 K) has been confirmed; this cannot be explained by the conventional pair-breaking effect due to magnetic field. In addition, the spontaneous enhancement of flux pinning, which is also associated with the peak effect, has been demonstrated microscopically. These results strongly suggest the onset of collective pinning induced by a new vortex state having an anomalously enhanced quasiparticle density of states for H≥H*.

    DOI: 10.1103/PhysRevB.63.224520

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  • Superconducting gap and pair breaking in CeRu2 studied by point contacts

    AV Moskalenko, YG Naidyuk, IK Yanson, M Hedo, Y Inada, Y Onuki, Y Haga, E Yamamoto

    LOW TEMPERATURE PHYSICS   27 ( 8 )   613 - 615   2001年8月

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    記述言語:英語   出版者・発行元:AMER INST PHYSICS  

    The superconducting gap in a CeRu2 single crystal is investigated by point contacts. BCS-like behavior of the gap Delta in the temperature range below T-c* (T-c*&lt;T-c, where T-c is the critical temperature) is established, indicating the presence of a gapless superconductivity region (between T-c* and T-c). The pair-breaking effect of paramagnetic impurities, supposedly Ce ions, is taken into consideration using the Scalski-Betbeder-Matibet-Weiss approach based on Abrikosov-Gorkov theory. It allows us to recalculate the superconducting order parameter Delta (alpha) (in the presence of paramagnetic impurities) and the gap Delta (p) (in the pure case) for the single crystal and for the previously studied polycrystalline CeRu2. The value 2 Delta (p)(0) approximate to 2 meV, with 2 Delta (p)(0)/k(B)T(c) approximate to 3.75, is found in both cases, indicating that CeRu2 is a "moderate" strong-coupling superconductor. (C) 2001 American Institute of Physics.

    DOI: 10.1063/1.1399197

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  • Elucidation of the stable vortex state across the peak effect region in CeRu2

    AA Tulapurkar, D Heidarian, S Sarkar, S Ramakrishnan, AK Grover, E Yamamoto, Y Haga, M Hedo, Y Inada, Y Onuki

    PHYSICA C   355 ( 1-2 )   59 - 64   2001年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We present magnetization data on a weakly pinned single crystal of CeRu2 showing the existence of a stable state of the vortex matter in the peak effect (PE) region. The stable state is achieved by cycling the magnetic field by a small amplitude. It is characterized by a unique value of the critical current density, independent of the magnetic history of the sample. The results support a recent phenomenological model proposed by Ravikumar et al. [Phys. Rev. B 61 (2000) R6479] which postulates a specific recipe to incorporate the history dependence of the current density. Our data also shows the occurrence of a first order phase transition from an ordered vortex phase to a disordered phase across the PE. (C) 2001 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4534(00)01772-X

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  • Possible nodal vortex state in CeRu2

    R Kadono, W Higemoto, A Koda, K Ohishi, T Yokoo, J Akimitsu, M Hedo, Y Inada, Y Onuki, E Yamamoto, Y Haga

    PHYSICAL REVIEW B   63 ( 22 )   2001年6月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    The microscopic property of magnetic vortices in the mixed state of a high-quality CeRu2 crystal has been studied by muon spin rotation. We have found that the spatial distribution of magnetic induction B(r) probed by muons is perfectly described by the London model for the triangular vortex lattice with appropriate modifications to incorporate the high-field cutoff around the vortex core and the effect of long-range defects in the vortex lattice structure at lower fields. The vortex core radius is proportional to H(beta -1)/2 with beta similar or equal to0.53 (H being the magnetic field), which is in good agreement with the recently observed nonlinear field dependence of the electronic specific heat coefficient gamma proportional toH(beta). In particular, the anomalous increase of magnetic penetration depth in accordance with the peak effect in de magnetization (greater than or equal toH*similar or equal to3 T at 2.0 K) has been confirmed; this cannot be explained by the conventional pair-breaking effect due to magnetic field. In addition, the spontaneous enhancement of flux pinning, which is also associated with the peak effect, has been demonstrated microscopically. These results strongly suggest the onset of collective pinning induced by a new vortex state having an anomalously enhanced quasiparticle density of states for H greater than or equal toH*.

    DOI: 10.1103/PhysRevB.63.224520

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  • Quadrupolar phase diagram and Fermi surface properties in the localized 5f(2)-electron system UPd3

    Y Tokiwa, K Sugiyama, T Takeuchi, M Nakashima, R Settai, Y Inada, Y Haga, E Yamamoto, K Kindo, H Harima, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 6 )   1731 - 1743   2001年6月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We measured the electrical resistivity, specific heat, magnetostriction, magnetization and de Haas-van Alphen (dHvA) oscillation in UPd3 with the hexagonal structure in order to clarify the quadrupolar and magnetic properties as well as the nature of conduction electrons. The high-field magnetization measurement at 4.2 K in magnetic fields up to about 50 T reveals two-successive metamagnetic transitions at 10.2 and 17.9T for the field along the [0001] direction, and one transition at 27.6T along [1120]. From the results of magnetization as well as the magnetostriction measurements at various temperatures, we determined the magnetic phase diagram. Phase boundaries are discussed on the basis of the crystalline electric field scheme of the 5f(2) configuration and the quadrupolar interaction of O-ZX. Reflecting title localized 5f-electrons, the conduction electrons have small cyclotron effective masses ranging from 0.24 to 3.62m(0), which were determined by the dHvA experiment. The dHvA data are compared to the result of band calculations based on the 5f(2)-localized band model.

    DOI: 10.1143/JPSJ.70.1731

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  • Observation of heavy electrons in the filled skutterudite PrFe4P12 via the de Haas-van Alphen effect

    H Sugawara, TD Matsuda, K Abe, Y Aoki, S Nojiri, Y Inada, R Settai, Y Onuki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   226   48 - 50   2001年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have succeeded in observing the de Haas-van Alphen (dHvA) oscillations in the filled skutterudite PrFe4P12. The results predict a large difference in topology of the Fermi surface compared to the reference compound LaFe4P12. The cyclotron effective mass is found to be extraordinarily enhanced with the maximum value of 67m(0). (C) 2001 Elsevier Science B.V. All rights reserved.

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  • 27aZB-4 CeRu_2の磁束格子状態における高磁場での異常な準粒子励起

    門野 良典, 髭本 亘, 幸田 章宏, 大石 一城, 横尾 哲也, 秋光 純, 辺土 正人, 稲田 佳彦, 大貫 惇睦, 山本 悦嗣, 芳賀 芳範

    日本物理学会講演概要集   56 ( 1 )   2001年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 27pYJ-8 dHvAと電子輸送から見たRFe_4P_<12>系の異常物性

    菅原 仁, 松田 達磨, 阿部 敬介, 並木 孝洋, 青木 勇二, 佐藤 英行, 野尻 さやか, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   56 ( 1 )   2001年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Electronic states of the antiferromagnet UGa3

    D Aoki, N Suzuki, K Miyake, Y Inada, R Settai, K Sugiyama, E Yamamoto, Y Haga, Y Onuki, T Inoue, K Kindo, H Sugawara, H Sato, H Yamagami

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 2 )   538 - 546   2001年2月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have grown a single crystal with the residual resistivity ratio of 81, and studied its electronic properties of the cubic antiferromagnetic compound UGa3. From the transverse magnetoresistance experiments, UGa3 has been found to be a compensated metal with equal carrier numbers of electrons and holes. In the de Haas-van Alphen experiments we have detected nine closed Fermi surfaces. Detected cyclotron effective mass is relatively large, ranging from 2.3 to 9.4 m(0). The topology of the Fermi surface is compared to the result of energy band calculations.

    DOI: 10.1143/JPSJ.70.538

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  • Magnetoresistance and de Haas-van Alphen effect in U(3)AS(4) and U3P4

    Y Inada, P Wisniewski, M Murakawa, D Aoki, K Miyake, N Watanabe, Y Haga, E Yamamoto, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   70 ( 2 )   558 - 568   2001年2月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We measured the transverse magnetoresistance and de Haas-van Alphen (dHvA) oscillation in the ferromagnetic compounds U3As4 and U3P4 The magnetoresistance in both compounds increases as a function of H-n (n similar or equal to 2) in a wide angular region, indicating that U3As4 and U3P4 are compensated metals. As for U3P4 the angular dependence of the magnetoresistance shows clearly dips for particular field directions. This implies the existence of a multiply-connected Fermi surface which favors open orbits along the [110] and [112] directions. We also detected several dHvA branches in U3As4 and U3P4 Most Of them are due to the closed Fermi surfaces, which are explained by recent results of fully relativistic spin-polarized LMTO band calculations. The cyclotron effective mass is large, ranging from 5 to 70 mo, and consistent with the electronic specific heat coefficient of 83 mJ/K-2.mol in U3As4 and 90 mJ/K-2.mol in U3P4.

    DOI: 10.1143/JPSJ.70.558

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  • Quasi-two-dimensional Fermi surfaces of the heavy fermion superconductor CeIrIn5

    Y Haga, Y Inada, H Harima, K Oikawa, M Murakawa, H Nakawaki, Y Tokiwa, D Aoki, H Shishido, S Ikeda, N Watanabe, Y Onuki

    PHYSICAL REVIEW B   63 ( 6 )   2001年2月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We observed the de Has-van Alphen oscillation in the heavy fermion compound CeIrIn5. The topology of the Fermi surface is found to be nearly cylindrical, reflecting the unique tetragonal structure. Observed branches are well explained bg the 4f-itinerant band model. The cyclotron masses of 20-30m(0) are one order larger than the corresponding band masses.

    DOI: 10.1103/PhysRevB.63.060503

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  • De Haas-van Alphen effect and Fermi surfaces in UC

    Etsuji Yamamoto, Yoshinori Haga, Takahiro Maehira, Yoshihiko Inada, Masao Murakawa, Yoshichika Onuki, Akira Hasegawa

    Journal of Magnetism and Magnetic Materials   226-230 ( I )   51 - 53   2001年

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    記述言語:英語   出版者・発行元:Elsevier  

    We grew a high-quality single crystal of UC and carried out the de Haas-van Alphen (dHvA) experiments. The Fermi surfaces of a semimetal UC were confirmed to consist of three ellipsoidal hole-Fermi surfaces centered at the X points and six cushion-like electron-Fermi surfaces centered at the W points in the FCC Brillouin zone. These Fermi surface properties are clarified on the basis of the combined results of dHvA experiments and SRAPW-energy band calculations. The hole and electron Fermi surfaces mainly originate from the C-2p valence band and the U-5f conduction band, respectively. The cyclotron mass of the hole is light, being a rest mass of an electron m0, while the mass of the electron is heavy, being in the range from 4.0 to 15m0. The mass enhancement is large for the electron Fermi surface, originated from the U-5f character. © 2001 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0304-8853(00)00621-1

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  • Single crystal growth and de Haas-van Alphen effect of TmAl3

    T. Ebihara, D. Aoki, Y. Inada, R. Settai, K. Sugiyama, Y. Haga, Y. Onuki

    Journal of Magnetism and Magnetic materials   2001年

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  • 25aSF-7 PrRu_4Sb_<12>のドハース・ファンアルフェン効果

    阿部 敬介, 松田 達磨, 並木 孝洋, 菅原 仁, 青木 勇二, 佐藤 英行, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   55 ( 2 )   2000年9月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 25aSF-4 PrFe_4P_<12>のドハース・ファンアルフェン効果

    菅原 仁, 松田 達磨, 阿部 敬介, 青木 勇二, 佐藤 英行, 野尻 さやか, 稲田 佳彦, 摂待 力生, 大貫 惇睦

    日本物理学会講演概要集   55 ( 2 )   2000年9月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 充填スクッテルダイトREFe_4P_<12>のde Haas-van Alphen 効果

    菅原 仁, 松田 達磨, 阿部 敬介, 青木 勇二, 佐藤 英行, 野尻 さやか, 稲田 佳彦, 摂待 力生, 大貫 惇睦, 播磨 尚朝

    日本応用磁気学会学術講演概要集 = Digest of ... annual conference on magnetics in Japan   24   2000年9月

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    記述言語:日本語  

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  • Fermi surface properties of the enhanced Pauli paramagnet UAl3

    D Aoki, N Watanabe, Y Inada, R Settai, K Sugiyama, H Harima, T Inoue, K Kindo, E Yamamoto, Y Haga, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 8 )   2609 - 2614   2000年8月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We succeeded in growing a high-quality single crystal of UAl3 with the cubic AuCu3-type structure and studied the :Fermi surface properties by measuring the de Haas-van Alphen (dHvA) effect and the magnetoresistance, together with the electrical resistivity, magnetic susceptibility and specific heat. Seven dHvA branches were observed, ranging from 1.1 x 10(6) to 1.5 x 10(8) Oe. These branches are partially explained by the result of band calculations based on the 5f-itinerant band model. The detected cyclotron mass is in the range from 3 to 17 m(0), suggesting the strong 5f hybridization with the conduction electrons, which is twice to three times larger than the corresponding band mass.

    DOI: 10.1143/JPSJ.69.2609

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  • Magnetic and Fermi surface properties of the ferromagnetic compound UGa2

    T Honma, Y Inada, R Settai, S Araki, Y Tokiwa, T Takeuchi, H Sugawara, H Sato, K Kuwahara, M Yokoyama, H Amitsuka, T Sakakibara, E Yamamoto, Y Haga, A Nakamura, H Harima, H Yamagami, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 8 )   2647 - 2659   2000年8月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient: thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal-structure. The 5f(2)- and 5f(3)-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f(2)- and 5f(3)-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2 m(0), which is consistent with the electronic specific heat coefficient of 11mJ/K-2.mol.

    DOI: 10.1143/JPSJ.69.2647

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  • Cylindrical Fermi surfaces formed by a flat magnetic Brillouin zone in uranium dipnictides

    D Aoki, P Wisniewski, K Miyake, N Watanabe, Y Inada, R Settai, E Yamamoto, Y Haga, Y Onuki

    PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES   80 ( 8 )   1517 - 1544   2000年8月

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    記述言語:英語   出版者・発行元:TAYLOR & FRANCIS LTD  

    We succeeded in growing high-quality single crystals of UX2 (X = Bi, Sb, As or P) by the self-flux and chemical transport methods and carried out de Haas-van Alphen and Shubnikov-de Haas experiments. We found quasi-two-dimensional Fermi surfaces in these U compounds. Fermi surfaces of UBi2 are found to consist of one spherical Fermi surface and two cylindrical Fermi surfaces. Each Fermi surface in UBi2 changes into two cylindrical surfaces in USb2 and UAs2. This change in the Fermi surfaces is well explained on the basis of a flat magnetic Brillouin zone. The quasi-two-dimensional character of the Fermi surfaces is mainly due to the conduction electrons in the U plane, including the 5f electrons. The itinerant nature of 5f electrons is reflected in the large cyclotron masses. The magnetic breakthrough (breakdown) phenomenon is also discussed for USb2.

    DOI: 10.1080/01418630050114718

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  • DHvA oscillation in the anisotropic superconductors of UPd2Al3 and URu2Si2

    Y Inada, Y Haga, H Ohkuni, Y Tokiwa, R Settai, T Honma, E Yamamoto, Y Onuki

    PHYSICA B   284   523 - 524   2000年7月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    UPd2Al3 and URu2Si2 are considered to be non-s-wave superconductors with an anisotropic energy gap from the NMR and specific heat measurements. We have succeeded in observing clearly the dHvA oscillation in both the normal and superconducting mixed states. The cyclotron mass is found to be reduced and the Dingle temperature increases in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 and URu2Si2 was discussed from the angular dependence of the dHvA amplitude in the mixed state. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)02122-5

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  • de Haas-van Alphen effect in a heavy fermion superconductor UPd2Al3

    Y Haga, Y Inada, K Sakurai, Y Tokiwa, E Yamamoto, T Honma, Y Onuki

    PHYSICA B   284   1291 - 1292   2000年7月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We measured de Haas-van Alphen oscillation in UPd2Al3 in order to reveal heavy electronic states at low temperatures down to 40 mK. For this purpose, we grew a high-quality single crystal using a purified uranium metal. All the branches reported in the previous work were observed in this study. In addition, we observed a new branch zeta with an extremely large cyclotron mass 65m(0). The dHvA frequency 9.96 x 10(7) Oe for branch zeta coincides with the band calculations based on the itinerant 5f electron picture. (C) 2000 Elsevier Science B.V. All rights reserved.

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  • Single-crystal growth and de Haas-van Alphen effect of YbAl3

    T. Ebihara, S. Uji, C. Terakura, T. Terashima, E. Yamamoto, Y. Haga, Y. Inada, Y. Onuki

    Physica B: Condensed Matter   281-282   754 - 755   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We succeeded in observing the de Haas-van Alphen (dHvA) oscillation of YbAl3. The single crystals were grown by the self-flux method. The residual resistivity and residual resistivity ratio were 0.5 μΩ cm and 60, respectively. Three fundamental dHvA branches were detected for the magnetic field along the 〈1 0 0〉 direction. Their cyclotron masses were in the range from 8.1 to 22 m0, reflecting a relatively large electronic specific heat coefficient γ = 58 mJ/K2 mol.

    DOI: 10.1016/S0921-4526(99)00982-5

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  • Single-crystal growth and de Haas-van Alphen effect of YbAl<sub>3</sub>(共著)

    Physica B   281-282   754 - 755   2000年6月

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  • Single-crystal Growth and de Haas-van Alphen Effect of YbAl<sub>3</sub>(共著)

    Physica B   281-282   754 - 755   2000年6月

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  • Single-crystal growth and de Haas-van Alphen effect of YbAl3

    T. Ebihara, S. Uji, C. Terakura, T. Terashima, E. Yamamoto, Y. Haga, Y. Inada, Y. Onuki

    Physica B: Condensed Matter   281-282   754 - 755   2000年6月

     詳細を見る

    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We succeeded in observing the de Haas-van Alphen (dHvA) oscillation of YbAl3. The single crystals were grown by the self-flux method. The residual resistivity and residual resistivity ratio were 0.5 μΩ cm and 60, respectively. Three fundamental dHvA branches were detected for the magnetic field along the 〈1 0 0〉 direction. Their cyclotron masses were in the range from 8.1 to 22 m0, reflecting a relatively large electronic specific heat coefficient γ = 58 mJ/K2 mol.

    DOI: 10.1016/S0921-4526(99)00982-5

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  • Magnetic, elastic, transport and Fermi surface properties of a ferromagnetic compound UGa<sub>2</sub>(共著)

    Physica B   281-282   195 - 196   2000年6月

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  • Single-crystal growth by flux method and Fermi surface of uranium compounds

    D. Aoki, P. Wisniewski, K. Miyake, R. Settai, Y. Inada, K. Sugiyama, E. Yamamoto, Y. Haga, Y. Onuki

    Physica B: Condensed Matter   281-282   761 - 763   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We have grown single crystals of UGa3, USb2 and UBi2 by the self-flux method and measured the de Haas-van Alphen (dHvA) oscillations. The detected Fermi surfaces were five closed ones in an antiferromagnetic compound UGa3. The cylindrical Fermi surfaces were observed for USb2 and UBi2, which manifests the two-dimensional character on the conduction electrons.

    DOI: 10.1016/S0921-4526(99)00843-1

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  • Single-crystal growth by flux method and Fermi surface of uranium compounds(共著)

    Physica B   281-282   761 - 763   2000年6月

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  • Cylindrical Fermi surfaces of UAs2 and UP2

    Piotr Wisniewski, Dai Aoki, Kohsaku Miyake, Narumi Watanabe, Yoshihiko Inada, Rikio Settai, Yoshinori Haga, Etsuji Yamamoto, Yoshichika Onuki

    Physica B: Condensed Matter   281-282   769 - 770   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We grew single crystals of tetragonal UAs2 and UP2 using chemical transport method. The residual resistivity ratio of 580 and 2900, respectively, indicated high quality of samples. Shubnikov-de Haas effect measurements performed on whisker single crystals of both compounds revealed seven fundamental oscillations in UAs2 and two in UP2. Five oscillations in UAs2 correspond to the cylindrical Fermi surfaces. The cyclotron masses in UAs2 were determined to range from 0.33 m0 to 4.5 m0. The two-dimensional Fermi surfaces are due to the strongly flattened magnetic Brillouin zone, the sequence of conducting U planes separated by weakly conducting As planes and, possibly, the anisotropic hybridization of 5f electrons.

    DOI: 10.1016/S0921-4526(99)00918-7

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  • Cylindrical Fermi surfaces of UAs<sub>2</sub> and UP<sub>2</sub>(共著)

    Physica B   281-282   769 - 770   2000年6月

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  • Magnetic, elastic, transport and fermi surface properties of a ferromagnetic compound UGa2

    T. Honma, E. Yamamoto, Y. Haga, R. Settai, S. Araki, Y. Inada, T. Takeuchi, K. Kuwahara, H. Amitsuka, T. Sakakibara, H. Sugawara, H. Sato, A. Nakamura, Y. Onuki

    Physica B: Condensed Matter   281-282   195 - 196   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    The 5f electronic properties in the ferromagnet UGa2 with the hexagonal structure were investigated. High quality samples were grown and their electrical resistivity, thermal expansion, elastic constant, Hall coefficient and de Haas-van Alphen oscillation were measured. Two characteristic temperatures were found: a Curie temperature at 123 K and another at 100 K below which the crystal is distorted in the basal plane. This distortion is most likely driven by the development of a ferromagnetic moment oriented along the [1 1 2̄ 0] direction.

    DOI: 10.1016/S0921-4526(99)01114-X

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  • Magnetization study in the superconducting mixed state of URu2Si2

    K. Tenya, K. Kuwahara, H. Amitsuka, T. Sakakibara, H. Ohkuni, Y. Inada, E. Yamamoto, Y. Haga, Y. Onuki

    Physica B: Condensed Matter   281-282   991 - 992   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    Magnetization measurements of a heavy fermion compound URu2Si2 have been performed in the superconducting state. Broad peak structure of the irreversible magnetization was observed around 50 kOe for H∥a. The Ginzburg-Landau parameter obtained from the equilibrium magnetization slightly decreases for H∥c with decreasing temperature, suggesting the presence of the paramagnetic suppression of the superconductivity. However, the suppression is not so large as expected from the Hc2(T) curve. Thermodynamic critical field appears to show unusual temperature dependence.

    DOI: 10.1016/S0921-4526(99)01090-X

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  • Magnetization study in the superconducting mixed state of URu<sub>2</sub>Si<sub>2</sub>(共著)

    Physica B   281-282   991 - 992   2000年6月

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  • Orbital polarization effect on electronic structure and Fermi surface in ferromagnetic UGa2

    Hiroshi Yamagami, Tetsuo Honma, Etsuji Yamamoto, Yoshinori Haga, Shingo Araki, Dai Aoki, Yoshihiko Inada, Rikio Settai, Yoshichika Önuki

    Physica B: Condensed Matter   281-282   771 - 772   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    A self-consistent band calculation including an orbital polarization is performed for ferromagnetic UGa2 on the basis of an all-electron fully-relativistic spin-polarized LAPW (RSPLAPW) method with exchange-correlation potentials in a local density approximation (LDA). The obtained magnetic moment is composed of the spin of about -2.0 μB and the orbital moment of about 4.9 μB. Accordingly, it can be interpreted as if the configuration were a localized 5f2, though the f character contains about 2.5 as valence electrons. From the band structure, the Fermi surface is constructed in order to analyze frequencies observed by the de Haas-van Alphen (dHvA) effect.

    DOI: 10.1016/S0921-4526(99)01217-X

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  • Orbital polarization effect on electronic structure and Fermi sureface in ferromagnetic UGa<sub>2</sub>(共著)

    Physica B   281-282   771 - 772   2000年6月

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  • De Haas-van Alphen effect in CeNi under pressure

    S. Araki, R. Settai, Y. Inada, Y. Önuki

    Physica B: Condensed Matter   281-282   736 - 737   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    An intermediate valence compound CeNi exhibits a phase transition under pressure, which is associated with the γ-α transition in Ce. To clarify a change of the electronic state under pressure, we measured the de Haas-van Alphen (dHvA) effect under pressure up to 6 kbar using a Cu-Be pressure cell. The dHvA branches are still observed after the phase transition. The topology of the Fermi surface is therefore unchanged. The cyclotron effective mass is, however, reduced from 11 to 3.2 m0 for branch ε and from 5.4 to 1.2 m0 for branch σ when the pressure is changed from 1 bar to 3.7 kbar.

    DOI: 10.1016/S0921-4526(99)00844-3

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  • De Haas-van Alphen effect in CeNi under pressure

    S. Araki, R. Settai, Y. Inada, Y. Önuki

    Physica B: Condensed Matter   281-282   736 - 737   2000年6月

     詳細を見る

    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    An intermediate valence compound CeNi exhibits a phase transition under pressure, which is associated with the γ-α transition in Ce. To clarify a change of the electronic state under pressure, we measured the de Haas-van Alphen (dHvA) effect under pressure up to 6 kbar using a Cu-Be pressure cell. The dHvA branches are still observed after the phase transition. The topology of the Fermi surface is therefore unchanged. The cyclotron effective mass is, however, reduced from 11 to 3.2 m0 for branch ε and from 5.4 to 1.2 m0 for branch σ when the pressure is changed from 1 bar to 3.7 kbar.

    DOI: 10.1016/S0921-4526(99)00844-3

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  • De Haas-van Alphen effect in CeNi under pressure(共著)

    Physica B   281-282   736 - 737   2000年6月

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  • Fermi surface property of UPt3 studied by de Haas-van Alphen and magnetoresistance experiments

    N. Kimura, T. Tani, H. Aoki, T. Komatsubara, S. Uji, D. Aoki, Y. Inada, Y. Onuki, Y. Haga, E. Yamamoto, H. Harima

    Physica B: Condensed Matter   281-282   710 - 715   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We have performed the de Haas-van Alphen (dHvA) and the magnetoresistance experiments in UPt3. The result of the magnetoresistance is consistent with the topology of the Fermi surface predicted from the 5f-itinerant band theory. The main Fermi surfaces detected by the dHvA are also well explained by the 5f-itinerant band model, although the cyclotron effective masses with 15-105 m0 are 10-20 times larger than the corresponding band masses.

    DOI: 10.1016/S0921-4526(99)01229-6

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  • Fermi surface property of UPt3 studied by de Haas-van Alphen and magnetoresistance experiments

    N. Kimura, T. Tani, H. Aoki, T. Komatsubara, S. Uji, D. Aoki, Y. Inada, Y. Onuki, Y. Haga, E. Yamamoto, H. Harima

    Physica B: Condensed Matter   281-282   710 - 715   2000年6月

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    記述言語:英語   出版者・発行元:Elsevier Science Publishers B.V.  

    We have performed the de Haas-van Alphen (dHvA) and the magnetoresistance experiments in UPt3. The result of the magnetoresistance is consistent with the topology of the Fermi surface predicted from the 5f-itinerant band theory. The main Fermi surfaces detected by the dHvA are also well explained by the 5f-itinerant band model, although the cyclotron effective masses with 15-105 m0 are 10-20 times larger than the corresponding band masses.

    DOI: 10.1016/S0921-4526(99)01229-6

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  • Fermi surface property of UPt<sub>3</sub> studied by de Haas-van Alphen and magnetoresistance experiments(共著)

    Physica B   281-282   710 - 715   2000年6月

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  • Cylindrical Fermi surfaces of UAs2 and UP2

    P Wisniewski, D Aoki, K Miyake, N Watanabe, Y Inada, R Settai, Y Haga, E Yamamoto, Y Onuki

    PHYSICA B   281   769 - 770   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We grew single crystals of tetragonal UAs2 and UP2 using chemical transport method. The residual resistivity ratio of 580 and 2900, respectively, indicated high quality of samples. Shubnikov-de Haas effect measurements performed on whisker single crystals of both compounds revealed seven fundamental oscillations in UAs2 and two in UP2. Five oscillations in UAs2 correspond to the cylindrical Fermi surfaces. The cyclotron masses in UAs2 were determined to range from 0.33m(0) to 4.5m(0). The two-dimensional Fermi surfaces are due to the strongly flattened magnetic Brillouin zone, the sequence of conducting U planes separated by weakly conducting As planes and, possibly, the anisotropic hybridization of 5f electrons. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00918-7

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  • Single-crystal growth and de Haas-van Alphen effect of YbAl3

    T Ebihara, S Uji, C Terakura, T Terashima, E Yamamoto, Y Haga, Y Inada, Y Onuki

    PHYSICA B   281   754 - 755   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We succeeded in observing the de Haas-van Alphen (dHvA) oscillation of YbAl3. The single crystals were grown by the self-flux method. The residual resistivity and residual resistivity ratio were 0.5 mu Omega cm and 60. respectively. Three fundamental dHvA branches were detected for the magnetic field along the [1 0 0] direction. Their cyclotron masses were in the range from 8.1 to 22m(0), reflecting a relatively large electronic specific heat coefficient gamma = 58 mJ/K-2 mol. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00982-5

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  • Magnetic, elastic, transport and fermi surface properties of a ferromagnetic compound UGa2

    T Honma, E Yamamoto, Y Haga, R Settai, S Araki, Y Inada, T Takeuchi, K Kuwahara, H Amitsuka, T Sakakibara, H Sugawara, H Sato, A Nakamura, Y Onuki

    PHYSICA B   281   195 - 196   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    In order to investigate the 5f electronic properties in a ferromagnet UGa2 with the hexagonal structure, we have performed the magnetic, elastic, transport and de Haas-van Alphen experiments. From these properties, the crystal distortion is found to occur below 100 K in the basal plane, which is most likely driven by the development of a ferromagnetic moment oriented along the [1 1 (2) over bar 0] direction. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01114-X

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  • Single-crystal growth by flux method and Fermi surface of uranium compounds

    D Aoki, P Wisniewski, K Miyake, R Settai, Y Inada, K Sugiyama, E Yamamoto, Y Haga, Y Onuki

    PHYSICA B   281   761 - 763   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have grown single crystals of UGa3, USb2 and UBi2 by the self-flux method and measured the de Haas-van Alphen (dHvA) oscillations. The detected Fermi surfaces were five closed ones in an antiferromagnetic compound UGa3. The cylindrical Fermi surfaces were observed for USb2 and UBI2, which manifests the two-dimensional character on the conduction electrons. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00843-1

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  • Quadrupolar ordering and de Haas-van Alphen effect in UPd3

    Y Tokiwa, K Sugiyama, T Takeuchi, R Settai, Y Inada, Y Haga, E Yamamoto, T Honma, K Sakurai, M Nakashima, K Miyake, K Kindo, Y Onuki

    PHYSICA B   281   604 - 605   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We determined the magnetic phase diagram of UPd3 with the hexagonal structure. There are three successive phase transitions at 7.5, 6.8 and 4.5 K. This first transition is due to the quadrupolar ordering, which was qualitatively discussed on the basis of the quadrupolar interaction with the order parameter O-zx. The de Haas-van Alphen experiments were also done to clarify the Fermi surface property. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00899-6

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  • Orbital polarization effect on electronic structure and Fermi surface in ferromagnetic UGa2

    H Yamagami, T Honma, E Yamamoto, Y Haga, S Araki, D Aoki, Y Inada, R Settai, Y Onuki

    PHYSICA B   281   771 - 772   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    A self-consistent band calculation including an orbital polarization is performed for ferromagnetic UGa2 on the basis of an all-electron fully-relativistic spin-polarized LAPW (RSPLAPW) method with exchange-correlation potentials in a local density approximation (LDA). The obtained magnetic moment is composed of the spin of about - 2.0 mu(B) and the orbital moment of about 4.9 mu(B). Accordingly, it can be interpreted as if the configuration were a localized 5f(2), though the f character contains about 2.5 as valence electrons. From the band structure, the Fermi surface is constructed in order to analyze frequencies observed by the de Haas-van Alphen (dHvA) effect. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01217-X

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  • Anisotropic superconducting energy gap studied by the dHvA effect in URu2Si2 and UPd2Al3

    Y Inada, H Ohkuni, Y Haga, Y Tokiwa, K Sakurai, T Honma, E Yamamoto, Y Onuki

    PHYSICA B   281   996 - 997   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    One branch has been detected in the: dr Haas-van Alphen (dHvA) experiments in both the normal and superconducting mixed stares of URu2Si2 and UPd2Al3 with an anisotropic superconducting energy gap. The corresponding Dingle temperatures increase and the cyclotron effective masses decrease in the mixed states. An anisotropic energy gap with a line node has been discussed from the angular dependence of the dHvA amplitude in the mixed state. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00811-X

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  • Observation of heavy electrons in UPd2Al3

    Y Haga, Y Inada, H Yamagami, K Sakurai, Y Tokiwa, E Yamamoto, T Honma, Y Onuki

    PHYSICA B   281   780 - 781   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We measured the de Haas-van Alphen oscillations in order to reveal heavy electronic states of UPd2Al3. All the branches reported in the previous work were observed in this study. In addition, we observed new branches. These branches are well explained by the results of fully relativistic spin-polarized LAPW band calculations. The cyclotron mass of each branch is large. indicating strong hybridization of 5f components. (C) 2000 Elsevicr Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01095-9

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  • Fermi surface of UB4 studied by the de Haas-van Alphen oscillation and magnetoresistance experiments

    E Yamamoto, T Honma, Y Haga, Y Inada, D Aoki, Y Tokiwa, N Suzuki, K Miyake, Y Onuki

    PHYSICA B   281   767 - 768   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We grew a high-quality single crystal of UB4 with the tetragonal structure and carried out the magnetoresistance and de Haas-van Alphen (dHvA) experiments. The magnetoresistance data indicate that UB4 is a compensated metal with equal numbers of electrons and holes, and has open orbits along the [1 0 0] and [0 1 0] directions. We detected about 11 dHvA branches. The cyclotron masses are moderately heavy, ranging from 3.0 to 14.1m(0), reflecting the electronic specific heat coefficient of 24.9 mJ/K-2 mel. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01096-0

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  • Fermi surfaces of RIn3 (R = Tb, Dy, Ho, Er, Tm, Yb and Lu)

    S Nojiri, Y Katayama, D Aoki, N Suzuki, K Sugiyama, R Settai, Y Inada, Y Onuki, H Harima

    PHYSICA B   281   747 - 749   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We observed the de Haas-van Alphen (dHvA) oscillations in RIn3 (R = Tb, Dy, Ho, Er, Tm Yb and Lu). The Fermi surfaces in each RIn3 are compared to the results of FLAPW band calculations. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)00902-3

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  • Magnetization study in the superconducting mixed state of URu2Si2

    K Tenya, K Kuwahara, H Amitsuka, T Sakakibara, H Ohkuni, Y Inada, E Yamamoto, Y Haga, Y Onuki

    PHYSICA B   281   991 - 992   2000年6月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Magnetization measurements of a heavy fermion compound URu2Si2 have been performed in the superconducting state. Broad peak structure of the irreversible magnetization was observed around 50 kOe for H parallel to n. The Ginzburg-landau parameter obtained from the equilibrium magnetization slightly decreases for H parallel to c with decreasing temperature, suggesting the presence of the paramagnetic suppression of the superconductivity. However, the suppression is not so large as expected from the H-c2(T) curve. Thermodynamic critical field appears to show unusual temperature dependence. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01090-X

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  • Itinerant f-electron systems of cerium and uranium compounds

    Y Onuki, Y Inada, H Ohkuni, R Settai, N Kimura, H Aoki, Y Haga, E Yamamoto

    PHYSICA B   280 ( 1-4 )   276 - 280   2000年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The f-electron systems of the cerium and uranium compounds have attracted attention in the context of heavy fermion and anisotropic superconductivity. We clarified an itinerant f-electron nature for UPt3 by the de Haas-van Alphen experiments, detecting heavy conduction electrons with 100m(0). The dHvA oscillation was also observed clearly in both the normal and superconducting mixed states in CeRu2,URu2Si2 and UPd2Al3. An anisotropic energy gap with a line node for URu2Si2 was discussed from the angular dependence of the dHvA amplitude in the mixed state. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01684-1

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  • Itinerant f-electron systems of cerium and uranium compounds

    Y Onuki, Y Inada, H Ohkuni, R Settai, N Kimura, H Aoki, Y Haga, E Yamamoto

    PHYSICA B   280 ( 1-4 )   276 - 280   2000年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The f-electron systems of the cerium and uranium compounds have attracted attention in the context of heavy fermion and anisotropic superconductivity. We clarified an itinerant f-electron nature for UPt3 by the de Haas-van Alphen experiments, detecting heavy conduction electrons with 100m(0). The dHvA oscillation was also observed clearly in both the normal and superconducting mixed states in CeRu2,URu2Si2 and UPd2Al3. An anisotropic energy gap with a line node for URu2Si2 was discussed from the angular dependence of the dHvA amplitude in the mixed state. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01684-1

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  • Itinerant f-electron systems of cerium and uranium compounds

    Y Onuki, Y Inada, H Ohkuni, R Settai, N Kimura, H Aoki, Y Haga, E Yamamoto

    PHYSICA B   280 ( 1-4 )   276 - 280   2000年5月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The f-electron systems of the cerium and uranium compounds have attracted attention in the context of heavy fermion and anisotropic superconductivity. We clarified an itinerant f-electron nature for UPt3 by the de Haas-van Alphen experiments, detecting heavy conduction electrons with 100m(0). The dHvA oscillation was also observed clearly in both the normal and superconducting mixed states in CeRu2,URu2Si2 and UPd2Al3. An anisotropic energy gap with a line node for URu2Si2 was discussed from the angular dependence of the dHvA amplitude in the mixed state. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(99)01684-1

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  • Fermi surface properties of USi3

    Y Tokiwa, H Harima, D Aoki, S Nojiri, M Murakawa, K Miyake, N Watanabe, R Settai, Y Inada, H Sugawara, H Sato, Y Haga, E Yamamoto, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 4 )   1105 - 1112   2000年4月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We succeeded in growing a single crystal of USi3 with the cubic crystal structure and measured the transverse magnetoresistance and de Haas-van Alphen(dHvA) oscillation. Fifteen dHvA branches were observed, ranging from 7.37x10(6) to 2.33x10(8) Oe. These branches are in good agreement with theoretical ones based on 5f-itinerant FLAPW band calculations. Cyclotron masses, which are in the range from 0.39 to 4.17 m(0), are approximately the same as the corresponding band masses. These results indicate that the itinerant 5f-electrons form wide bands. The magnetoresistance results confirmed the existence of open orbits, which can he well explained by the band 10-electron Fermi surface.

    DOI: 10.1143/JPSJ.69.1105

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  • Heavy fermions in YbAl3 studied by the de Haas-van Alphen effect

    T Ebihara, Y Inada, M Murakawa, S Uji, C Terakura, T Terashima, E Yamamoto, Y Haga, Y Onuki, H Harima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 3 )   895 - 899   2000年3月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    The carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named beta with a dHvA frequency of 4.5 x 10(7) Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m(0). The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m(0). The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl3 are below the Fermi level. A small alteration so as to shift upwards the 4f levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.

    DOI: 10.1143/JPSJ.69.895

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  • Heavy fermions in YbAl3 studied by the de Haas-van Alphen effect

    T Ebihara, Y Inada, M Murakawa, S Uji, C Terakura, T Terashima, E Yamamoto, Y Haga, Y Onuki, H Harima

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   69 ( 3 )   895 - 899   2000年3月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    The carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named beta with a dHvA frequency of 4.5 x 10(7) Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m(0). The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m(0). The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl3 are below the Fermi level. A small alteration so as to shift upwards the 4f levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.

    DOI: 10.1143/JPSJ.69.895

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  • Fermi surface properties of enhanced pauli paramagnet UAl<sub>3</sub>(共著)

    Journal of the Physical Society of Japan   69 ( 8 )   2609 - 2614   2000年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.69.2609

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  • Vortex lattice and quasiparticle density of states in CeRu<sub>2</sub> studied by scanning tunneling spectroscopy(共著)

    Journal of the Physical Society of Japan   69 ( 7 )   1970 - 1973   2000年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.69.1970

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  • Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li2Pt3B

    Masahide NISHIYAMA, Yoshihiko INADA, Guo-qing ZHENG

    Physical Review Letters   98   047002   2000年

  • Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy

    Hideaki Sakata, Nobuhiko Nishida, Masato Hedo, Kenji Sakurai, Yoshihiko Inada, Yoshichika Onuki, Etsuji Yamamoto, Yoshinori Haga

    Journal of the Physical Society of Japan   69 ( 7 )   1970 - 1973   2000年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    Scanning tunneling microscopy (STM) and spectroscopy (STS) measurements have been performed on an intermetallic compound CeRu2 down to 2.2 K. Vacuum tunneling spectra have been measured on the surface prepared by cracking the sample in helium gas at 4.2 K. The shape and temperature dependence of the quasiparticle density of states, Ns(E, r), have been well interpreted in terms of s-wave BCS superconductors. In magnetic fields, the hexagonal vortex lattice has been imaged by measurements of NS(E = 0, r) up to 2 T. This is the first observation of the vortex lattice by STS in heavy-fermion superconductors.

    DOI: 10.1143/JPSJ.69.1970

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  • Fermi surface and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3

    Y Inada, H Yamagami, Y Haga, K Sakurai, Y Tokiwa, T Honma, E Yamamoto, Y Onuki, T Yanagisawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 11 )   3643 - 3654   1999年11月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    The dHvA oscillation was observed clearly in both the normal and superconducting mixed states for UPd2Al3 with the hexagonal structure. Eight kinds of dHvA branches were detected, which are well explained by the results of band calculations based on a fully-relativistic spin-polarized LAPW method. An inner orbit of a hand 41-hole Fermi surface; named zeta, has the largest dHvA frequency of 9.45x10(7) Oe and cyclotron mass of 65 m(0), reflecting a large electronic specific heat coefficient of 145 mJ/K-2.mol. Branch alpha of a hand 40-hole Fermi surface was observed in both the normal and superconducting mixed states, where the dHvA frequency does not change in magnitude between the normal and mixed states. The cyclotron effective mass of branch alpha is, however, found to be reduced and the corresponding Dingle temperature or scattering rate of the conduction electron increases with decreasing the field in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 is discussed from the angular dependence of the dHvA amplitude in the mixed state.

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  • Magnetoresistance and de Haas-van Alphen effect in UB4

    E Yamamoto, T Honma, Y Haga, Y Inada, D Aoki, Y Tokiwa, N Suzuki, K Miyake, Onuki, I

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 10 )   3347 - 3351   1999年10月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We grew a single crystal of UB4 with the tetragonal structure and carried out the magnetoresistance and de Haas-van Alphen (dHvA) experiments. The magnetoresistance data indicate that UB4, which is a compensated metal with equal carrier numbers of electrons and holes: most likely has open orbits along the [100] and [010] directions. We detected about eleven dHvA branches. The cyclotron masses are moderately heavy, ranging from 3.0 to 14.1m(o), reflecting the electronic specific heat coefficient of 24.9 mJ/K-2.mol.

    DOI: 10.1143/JPSJ.68.3347

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  • Magnetic phase diagram in UCd11

    D Aoki, T Inoue, K Kindo, N Suzuki, K Miyake, Y Inada, R Settai, K Sugiyama, E Yamamoto, Y Haga, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 9 )   3117 - 3118   1999年9月

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    記述言語:英語   出版者・発行元:PHYSICAL SOCIETY JAPAN  

    DOI: 10.1143/JPSJ.68.3117

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  • Photoemission study of an f-electron superconductor: CeRu2

    JS Kang, CG Olson, M Hedo, Y Inada, E Yamamoto, Y Haga, Y Onuki, SK Kwon, BI Min

    PHYSICAL REVIEW B   60 ( 8 )   5348 - 5353   1999年8月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    Photoemission study has been performed for a high-quality single crystal of CeRu2, including resonant photoemission near the Ce 4d--&gt;4f absorption edge and high-resolution photoemission at a low-photon energy. Resonant photoemission study provides evidence for the large hybridization between Ce 4f and conduction electrons, indicating mixed-valence in CeRu2. It is found that the line shape of the high-resolution spectrum near the Fermi level depends on the experimental conditions and the sample surface treatment. Comparison of photoemission data to the calculated density of states reveals that band calculations provide a reasonably good description of the electronic structure of CeRu2. [S0163-1829(99)01831-7].

    DOI: 10.1103/PhysRevB.60.5348

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  • Crystal growth and cylindrical Fermi surfaces of USb2

    D Aoki, P Wisniewski, K Miyake, N Watanabe, Y Inada, R Settai, E Yamamoto, Y Haga, Y Ouki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 7 )   2182 - 2185   1999年7月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have gown high-quality single crystals of tetragonal USb2 using a flux method. We have detected five branches in de Haas-van Alphen (dHvA) experiments. Frequencies of all dHvA branches follow the 1/cos theta-dependence, revealing the presence of cylindrical Fermi surfaces, where theta is a tilt angle from [001] to [100]. The cyclotron masses are in the range from 1.84 to 8.33 m(0). The two-dimensional Fermi surfaces are due to the conduction electrons in the U-plane, including the itinerant 5f-electrons.

    DOI: 10.1143/JPSJ.68.2182

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  • Fermi surface properties and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of URu2Si2

    H Ohkuni, Y Inada, Y Tokiwa, K Sakurai, R Settai, T Honma, Y Haga, E Yamamoto, Y Onuki, H Yamagami, S Takahashi, T Yanagisawa

    PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES   79 ( 7 )   1045 - 1077   1999年7月

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    記述言語:英語   出版者・発行元:TAYLOR & FRANCIS LTD  

    We have succeeded in growing a high-quality single crystal of URu2Si2 with a residual resistivity ratio of 255 and performed magnetoresistance and de Haas-van Alphen (dHvA) experiments. The dHvA oscillations were observed clearly in both the normal and superconducting mixed states. From the magnetoresistance experiments, it is concluded that URu2Si2 is a compensated metal with equal carrier numbers of electrons and holes. In the dHvA experiments we observed three kinds of Fermi surfaces. We studied precisely the Fermi surface properties in both the normal and mixed states. The dHvA frequency does not change in magnitude between the normal and mixed states, while the cyclotron effective mass is reduced, and the corresponding Dingle temperature or scattering rate of the conduction electron increases in the mixed state.

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  • Electrical and thermal properties of UB2

    E Yamamoto, T Honma, Y Haga, Y Inada, D Aoki, N Suzuki, R Settai, H Sugawara, H Sato, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 3 )   972 - 975   1999年3月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    We have measured the electrical resistivity, thermoelectric power, magnetic susceptibility, magnetoresistance and specific heat of a Pauli paramagnetic compound UB2. The magnetoresistance shows an extremely large H-2-dependence for any field directions, indicating a compensated metal without an open orbit. This result is consistent with the results of the dHvA experiment and 5f-itinerant hand calculation.

    DOI: 10.1143/JPSJ.68.972

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  • De Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3

    Y Haga, Y Inada, K Sakurai, Y Tokiwa, E Yamamoto, T Honma, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 2 )   342 - 345   1999年2月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:PHYSICAL SOC JAPAN  

    We succeeded in growing a high-quality single crystal of the heavy fermion superconductor UPd2Al3 and observed the de Haas-van Alphen (dHvA) oscillation in both the normal and superconducting mixed states. The dHvA frequency, which is proportional to a maximum cross-sectional area of the electron Fermi surface labelled alpha, does not change in magnitude between the normal and mixed states, while the cyclotron mass of 5.7 m(0) in the normal state is reduced to 3.5 m(0) at 0.7 H-c2, and the corresponding Dingle temperature of 0.20 K in the normal state is increased to 0.39 It at 0.7 H-c2. Here, H-c2 of 39 kOe is the upper critical field along the [0001] direction in the hexagonal structure.

    DOI: 10.1143/JPSJ.68.342

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  • De Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3

    Y Haga, Y Inada, K Sakurai, Y Tokiwa, E Yamamoto, T Honma, Y Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 2 )   342 - 345   1999年2月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:PHYSICAL SOC JAPAN  

    We succeeded in growing a high-quality single crystal of the heavy fermion superconductor UPd2Al3 and observed the de Haas-van Alphen (dHvA) oscillation in both the normal and superconducting mixed states. The dHvA frequency, which is proportional to a maximum cross-sectional area of the electron Fermi surface labelled alpha, does not change in magnitude between the normal and mixed states, while the cyclotron mass of 5.7 m(0) in the normal state is reduced to 3.5 m(0) at 0.7 H-c2, and the corresponding Dingle temperature of 0.20 K in the normal state is increased to 0.39 It at 0.7 H-c2. Here, H-c2 of 39 kOe is the upper critical field along the [0001] direction in the hexagonal structure.

    DOI: 10.1143/JPSJ.68.3643

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  • Photoemission lineshape of CeNiSn near the Fermi level

    JS Kang, Y Inada, Y Onuki, CG Olson, SK Kwon, BI Min

    PHYSICA B-CONDENSED MATTER   259-61   1116 - 1117   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    The high-resolution photoemission spectroscopy study of single crystalline CeNiSn indicates a finite density of states at E(F), implying a semi-metallic ground state. This finding is supported by the lineshape analysis using the DOS models. The Ce 4f spectrum exhibits three peak structures, in which the peak near-E(F) is found to reflect a substantially large Ce 4f-Sn sp hybridization. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00821-7

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  • Field-history-dependent peak effect in the superconducting mixed state of CeRu2

    K Tenya, S Yasunami, T Tayama, H Amitsuka, T Sakakibara, M Hedo, Y Inada, Y Haga, E Yamamoto, Y Onuki

    PHYSICA B-CONDENSED MATTER   259-61   692 - 693   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Detailed magnetization measurements of CeRu2 single crystals with different purity are performed in order to clarify whether their peak effects are due to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) transition. The onset field of the peak shifts to lower held side as the sample becomes impure. Regardless of the purity the Ginzburg-Landau parameter kappa(2) continues to increase on cooling from T-c, indicating little paramagnetic suppression of the superconductivity. These results disagree with the scenario of the FFLO transition. (C) 1999 Elsevier Science B.V, All rights reserved.

    DOI: 10.1016/S0921-4526(98)00819-9

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  • de Haas-van Alphen oscillation in the superconducting mixed states of CeRu2 and URu2Si2

    Y Onuki, Y Inada, M Hedo, H Ohkuni, K Sakurai, Y Tokiwa, E Yamamoto, Y Haga, T Honma, S Takahashi

    PHYSICA B-CONDENSED MATTER   259-61   1060 - 1065   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We succeeded in growing high-quality single crystals of CeRu2 and URu2Si2 and observed the de Haas-van Alphen (dHvA) oscillations in both the normal and superconducting mixed states. The dHvA frequency does not change in magnitude between the normal and superconducting mixed states, while the cyclotron mass is reduced, and the corresponding Dingle temperature or the scattering rate of the conduction electron increases in the mixed state. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)01164-8

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  • de Haas-van Alphen oscillation in the superconducting mixed states of CeRu<sub>2</sub> and URu<sub>2</sub>Si<sub>2</sub>(共著)

    Physica B   259-61   1060 - 1065   1999年1月

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  • Characterization and flux flow experiments in CeRu2

    M Hedo, Y Kobayashi, Y Inada, E Yamamoto, Y Haga, J Suzuki, N Metoki, Y Onuki, H Sugawara, H Sato, K Tenya, T Tayama, H Amitsuka, T Sakakibara

    PHYSICA B-CONDENSED MATTER   259-61   688 - 689   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have carried out the flux dow experiments for two single crystal samples with the residual resistivity ratio RRR = 240 and 12 which differ highly in quality. The peak structure, which is observed in the vicinity of H-c2, is dominant for the RRR = 12 sample, while it is slightly observed for the RRR = 240 sample. The flux flow, however, starts at a low field for the RRR = 12 sample, compared to that for the RRR = 240 sample. It means that a pinning force for the RRR = 12 sample is smaller than that for the RRR = 240 sample. These characteristic features might be closely related to layered defects and Ru-vacancies which exist heavily in the RRR = 12 sample. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00937-5

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  • Fermi surfaces of RPb3

    D Aoki, Y Katayama, S Nojiri, R Settai, Y Inada, K Sugiyama, Y Onuki, H Harima, Z Kletowski

    PHYSICA B-CONDENSED MATTER   259-61   1083 - 1084   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have observed the de Haas-van Alphen (dHvA) oscillations in SmPb3, GdPb3, EuPb3 and YbPb3. Detected dHvA branches are discussed on the basis of the result of the FLAPW band calculation. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00938-7

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  • de Haas-van Alphen oscillation in the superconducting mixed states of CeRu2 and URu2Si2

    Y Onuki, Y Inada, M Hedo, H Ohkuni, K Sakurai, Y Tokiwa, E Yamamoto, Y Haga, T Honma, S Takahashi

    PHYSICA B-CONDENSED MATTER   259-61   1060 - 1065   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We succeeded in growing high-quality single crystals of CeRu2 and URu2Si2 and observed the de Haas-van Alphen (dHvA) oscillations in both the normal and superconducting mixed states. The dHvA frequency does not change in magnitude between the normal and superconducting mixed states, while the cyclotron mass is reduced, and the corresponding Dingle temperature or the scattering rate of the conduction electron increases in the mixed state. (C) 1999 Elsevier Science B.V. All rights reserved.

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  • de Haas-van Alphen effect of the heavy-fermion superconductor URu2Si2

    Y Inada, H Ohkuni, M Hedo, Y Tokiwa, K Sakurai, Y Haga, E Yamamoto, T Honma, Y Onuki

    PHYSICA B-CONDENSED MATTER   259-61   642 - 643   1999年1月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have measured the de Haas-van Alphen (dHvA) effect of URu2Si2. One kind of the dHvA branch, which corresponds to an almost spherical Fermi surface, has been detected both in the normal and super-conducting mixed states. The dHvA frequency in the mixed state is unchanged from the normal state. The cyclotron effective mass is clearly found to decrease with decreasing the magnetic field below H-c2 and the corresponding Dingle temperature increases with decreasing the held. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)01080-1

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  • Magnetization study on the history-dependent peak effect in the superconducting mixed state of CeRu2

    K Tenya, S Yasunami, T Tayama, H Amitsuka, T Sakakibara, M Hedo, Y Inada, E Yamamoto, Y Haga, K Onuki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   68 ( 1 )   224 - 231   1999年1月

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    記述言語:英語   出版者・発行元:PHYSICAL SOC JAPAN  

    A huge peak of irreversible magnetization in CeRu2 single crystal, together with the equilibrium magnetization. was investigated by means of a static magnetization measurement using a Faraday force magnetometer. The residual resistance ratio of the used crystal exceeds 250, indicating that it is a clean superconductor. Contrary to the previous reports, there is no pinning-free region in the magnetization curves below the upper critical field H-c2. The detailed minor-hysteresis-loop measurement has revealed that the peak structure in the increasing-field magnetization curve around the onset field of the peak strongly depends on previous field-history, resulting in an apparent asymmetry of the peak structure. No trace of paramagnetic suppression of superconductivity in the vortex-penetrated state is observed from the superconducting equilibrium magnetization curves. The peak position, although highly anisotropic, can be interrelated to the peak strength, regardless of the applied field direction. It is likely that the irreversibility peak is due to a synchronization pinning of the defective nux line lattice, rather than due to a first-order transition from the mixed state to the Fulde-Ferrell-Larkin-Ovchinnikov state.

    DOI: 10.1143/JPSJ.68.224

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  • Photoemission lineshape of CeNiSn near the Fermi level(共著)

    Physica B   259-261   1116 - 1117   1999年

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  • Crystal Growth and Cylindrical Fermi Surfaces of USb2

    Dai Aoki, Piotr Wiśniewski, Kohsaku Miyake, Narumi Watanabe, Yoshihiko Inada, Rikio Settai, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki

    Journal of the Physical Society of Japan   68 ( 7 )   2182 - 2185   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have grown high-quality single crystals of tetragonal USb2 using a flux method. We have detected five branches in de Haas-van Alphen (dHvA) experiments. Frequencies of all dHvA branches follow the 1/ cos θ-dependence, revealing the presence of cylindrical Fermi surfaces, where θ is a tilt angle from [001] to [100]. The cyclotron masses are in the range from 1.84 to 8.33 m0. The two-dimensional Fermi surfaces are due to the conduction electrons in the U-plane, including the itinerant 5f-electrons.

    DOI: 10.1143/JPSJ.68.2182

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  • Crystal Growth and Cylindrical Fermi Surfaces of USb<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   68 ( 7 )   2182 - 2185   1999年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.68.2182

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  • Electrical and thermal properties of UB2

    Etsuji Yamamoto, Tetsuo Honma, Yoshinori Haga, Yoshihiko Inada, Dai Aoki, Norihito Suzuki, Rikio Settai, Hitoshi Sugawara, Hideyuki Sato, Yoshichika Onuki

    Journal of the Physical Society of Japan   68 ( 3 )   972 - 975   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have measured the electrical resistivity, thermoelectric power, magnetic susceptibility, magnetoresistance and specific heat of a Pauli paramagnetic compound UB2. The magnetoresistance shows an extremely large H2-dependence for any field directions, indicating a compensated metal without an open orbit. This result is consistent with the results of the dHvA experiment and 5f-itinerant band calculation.

    DOI: 10.1143/JPSJ.68.972

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  • Electrical and Thermal Properties of UB<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   68 ( 3 )   972 - 975   1999年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.68.972

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  • Fermi Surface Properties in Sr<sub>2</sub>RuO<sub>4</sub>(共著)

    Journal of the Physical Society of Japan   68 ( 9 )   3041 - 3053   1999年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.68.3041

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  • De Haas-van Alphen Effect and RLAPW-Energy Band Calculations in CeNi

    Shingo Araki, Rikio Settai, Yoshihiko Inada, Yoshichika Onuki, Hiroshi Yamagami

    Journal of the Physical Society of Japan   68 ( 10 )   3334 - 3340   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have carried out the de Haas-van Alphen (dHvA) experiments in a valence fluctuating compound CeNi. Forty seven dHvA branches are observed experimentally, which are mainly centered at the symmetrical axes. Most of the dHvA branches are approximately explained by the 4f-itinerant band model. The cyclotron mass is in the range from 3.0 to 27 m0. Branch α, which has the largest cross-sectional area of the Fermi surface in the detected branches along the a-axis, has the cyclotron mass of 27 m0. This mass is five times larger than the corresponding band mass of 5.45 m0.

    DOI: 10.1143/JPSJ.68.3334

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  • De Haas-van Alphen Effect and RLAPW-Energy Band Calculations in CeNi

    Shingo Araki, Rikio Settai, Yoshihiko Inada, Yoshichika Onuki, Hiroshi Yamagami

    Journal of the Physical Society of Japan   68 ( 10 )   3334 - 3340   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have carried out the de Haas-van Alphen (dHvA) experiments in a valence fluctuating compound CeNi. Forty seven dHvA branches are observed experimentally, which are mainly centered at the symmetrical axes. Most of the dHvA branches are approximately explained by the 4f-itinerant band model. The cyclotron mass is in the range from 3.0 to 27 m0. Branch α, which has the largest cross-sectional area of the Fermi surface in the detected branches along the a-axis, has the cyclotron mass of 27 m0. This mass is five times larger than the corresponding band mass of 5.45 m0.

    DOI: 10.1143/JPSJ.68.3334

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  • de Haas-van Alphen Effect and RLAPW-Energy Band Calculations in CeNi(共著)

    Journal of the Physical Society of Japan   68 ( 10 )   3334 - 3340   1999年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.68.3334

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  • Fermi surface properties in Sr2RuO4

    Yoshiyuki Yoshida, Atsushi Mukai, Rikio Settai, Kousaku Miyake, Yoshihiko Inada, Yoshichika Onuki, Kiyoshi Betsuyaku, Hisatomo Harima, Tatsuma D. Matsuda, Yuji Aoki, Hideyuki Sato

    Journal of the Physical Society of Japan   68 ( 9 )   3041 - 3053   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We measured the de Haas-van Alphen (dHvA) effect, magnetoresistance and specific heat to clarify the two-dimensional Fermi surface properties of Sr2RuO4. From the angular dependence of the dHvA amplitude, we determined the Yamaji angle for three quasi-cylindrical Fermi surfaces α, β and γ to be 30.6° for the Fermi surface α, about 30° for β and 15.3° for γ. The cyclotron masses of sum and difference oscillatory components, m* β ± α and m* γ ± α, are found to be highly different from m* β + m* α and m* γ + m* α, respectively, for any field direction. The dHvA oscillation due to sums and differences is not due to the magnetic interaction but to the chemical potential oscillation for quasi-two-dimensional Fermi surfaces. The specific heat data are discussed from a viewpoint of a characteristic energy gap in a possible p-wave superconductor Sr2RuO4.

    DOI: 10.1143/JPSJ.68.3041

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  • Fermi surface properties in Sr2RuO4

    Yoshiyuki Yoshida, Atsushi Mukai, Rikio Settai, Kousaku Miyake, Yoshihiko Inada, Yoshichika Onuki, Kiyoshi Betsuyaku, Hisatomo Harima, Tatsuma D. Matsuda, Yuji Aoki, Hideyuki Sato

    Journal of the Physical Society of Japan   68 ( 9 )   3041 - 3053   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We measured the de Haas-van Alphen (dHvA) effect, magnetoresistance and specific heat to clarify the two-dimensional Fermi surface properties of Sr2RuO4. From the angular dependence of the dHvA amplitude, we determined the Yamaji angle for three quasi-cylindrical Fermi surfaces α, β and γ to be 30.6° for the Fermi surface α, about 30° for β and 15.3° for γ. The cyclotron masses of sum and difference oscillatory components, m* β ± α and m* γ ± α, are found to be highly different from m* β + m* α and m* γ + m* α, respectively, for any field direction. The dHvA oscillation due to sums and differences is not due to the magnetic interaction but to the chemical potential oscillation for quasi-two-dimensional Fermi surfaces. The specific heat data are discussed from a viewpoint of a characteristic energy gap in a possible p-wave superconductor Sr2RuO4.

    DOI: 10.1143/JPSJ.68.3041

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  • Fermi surface of UB2 studied by the de Haas-van Alphen oscillation

    E. Yamamoto, T. Honma, Y. Haga, Y. Inada, D. Aoki, M. Hedo, Y. Yoshida, H. Yamagami, Y. Onuki

    Physica B: Condensed Matter   259-261   1085 - 1086   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    We observed the de Haas-van Alphen (dHvA) oscillation of UB2 with a hexagonal structure. All of the detected dHvA branches, which are about seven in number, are detected in the limited angle regions. The cyclotron masses are moderately heavy, ranging from 1.2 to 7.7 m0. These features of the Fermi surface are well explained by the 5f-itinerant band theory. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)01085-0

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  • Fermi surface of UB<sub>2</sub> studied by the de Haas-van Alphen oscillation(共著)

    Physica B   259-261   1085 - 1086   1999年

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  • Field-history-dependent peak effect in the superconducting mixed state of CeRu2

    K. Tenya, S. Yasunami, T. Tayama, H. Amitsuka, T. Sakakibara, M. Hedo, Y. Inada, Y. Haga, E. Yamamoto, Y. Onuki

    Physica B: Condensed Matter   259-261   692 - 693   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    Detailed magnetization measurements of CeRu2 single crystals with different purity are performed in order to clarify whether their peak effects are due to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) transition. The onset field of the peak shifts to lower field side as the sample becomes impure. Regardless of the purity the Ginzburg-Landau parameter κ2 continues to increase on cooling from Tc, indicating little paramagnetic suppression of the superconductivity. These results disagree with the scenario of the FFLO transition. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00819-9

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  • Field-history-dependent peak effect in the superconducting mixed state of CeRu<sub>2</sub>(共著)

    Physica B   259-261   692 - 693   1999年

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  • Characterization and flux flow experiments in CeRu2

    M. Hedo, Y. Kobayashi, Y. Inada, E. Yamamoto, Y. Haga, J. Suzuki, N. Metoki, Y. Onuki, H. Sugawara, H. Sato, K. Tenya, T. Tayama, H. Amitsuka, T. Sakakibara

    Physica B: Condensed Matter   259-261   688 - 689   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have carried out the flux flow experiments for two single crystal samples with the residual resistivity ratio RRR = 240 and 12 which differ highly in quality. The peak structure, which is observed in the vicinity of Hc2, is dominant for the RRR = 12 sample, while it is slightly observed for the RRR = 240 sample. The flux flow, however, starts at a low field for the RRR = 12 sample, compared to that for the RRR = 240 sample. It means that a pinning force for the RRR = 12 sample is smaller than that for the RRR = 240 sample. These characteristic features might be closely related to layered defects and Ru-vacancies which exist heavily in the RRR = 12 sample. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00937-5

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  • Characterization and flux flow experiments in CeRu<sub>2</sub>(共著)

    Physica B   259-261   688 - 689   1999年

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  • Fermi surface of UB2 studied by the de Haas-van Alphen oscillation

    E. Yamamoto, T. Honma, Y. Haga, Y. Inada, D. Aoki, M. Hedo, Y. Yoshida, H. Yamagami, Y. Onuki

    Physica B: Condensed Matter   259-261   1085 - 1086   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    We observed the de Haas-van Alphen (dHvA) oscillation of UB2 with a hexagonal structure. All of the detected dHvA branches, which are about seven in number, are detected in the limited angle regions. The cyclotron masses are moderately heavy, ranging from 1.2 to 7.7 m0. These features of the Fermi surface are well explained by the 5f-itinerant band theory. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)01085-0

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  • Fermi surfaces of RPb3

    D. Aoki, Y. Katayama, S. Nojiri, R. Settai, Y. Inada, K. Sugiyama, Y. Onuki, H. Harima, Z. Kletowski

    Physica B: Condensed Matter   259-261   1083 - 1084   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have observed the de Haas-van Alphen (dHvA) oscillations in SmPb3, GdPb3, EuPb3 and YbPb3. Detected dHvA branches are discussed on the basis of the result of the FLAPW band calculation. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00938-7

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  • Fermi surfaces of RPb<sub>3</sub>(共著)

    Physica B   259-261   1083 - 1084   1999年

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  • Magnetization study on the history-dependent peak effect in the superconducting mixed state of CeRu2

    Kenichi Tenya, Shinji Yasunami, Takashi Tayama, Hiroshi Amitsuka, Toshiro Sakakibara, Masato Hedo, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki

    Journal of the Physical Society of Japan   68 ( 1 )   224 - 231   1999年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    A huge peak of irreversible magnetization in CeRu2 single crystal, together with the equilibrium magnetization, was investigated by means of a static magnetization measurement using a Faraday force magnetometer. The residual resistance ratio of the used crystal exceeds 250, indicating that it is a clean superconductor. Contrary to the previous reports, there is no pinning-free region in the magnetization curves below the upper critical field Hc2. The detailed minor-hysteresis-loop measurement has revealed that the peak structure in the increasing-field magnetization curve around the onset field of the peak strongly depends on previous field-history, resulting in an apparent asymmetry of the peak structure. No trace of paramagnetic suppression of superconductivity in the vortex-penetrated state is observed from the superconducting equilibrium magnetization curves. The peak position, although highly anisotropic. can be interrelated to the peak strength, regardless of the applied field direction. It is likely that the irreversibility peak is due to a synchronization pinning of the defective flux line lattice, rather than due to a first-order transition from the mixed state to the Fulde-Ferrell-Larkin-Ovchinnikov state.

    DOI: 10.1143/JPSJ.68.224

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  • Magnetization Study on the History-Dependent Peak Effect in the Superconducting Mixed State of CeRu <sub>2</sub> (共著)

    Journal of the Physical Society of Japan   68 ( 1 )   224 - 231   1999年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.68.224

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  • Photoemission lineshape of CeNiSn near the Fermi level

    J. S. Kang, Y. Inada, Y. Onuki, C. G. Olson, S. K. Kwon, B. I. Min

    Physica B: Condensed Matter   259-261   1116 - 1117   1999年

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    記述言語:英語   出版者・発行元:Elsevier  

    The high-resolution photoemission spectroscopy study of single crystalline CeNiSn indicates a finite density of states at EF, implying a semi-metallic ground state. This finding is supported by the lineshape analysis using the DOS models. The Ce 4f spectrum exhibits three peak structures, in which the peak near-EF is found to reflect a substantially large Ce 4f-Sn sp hybridization. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0921-4526(98)00821-7

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  • A novel technique to measure magnetisation hysteresis curves in the peak-effect regime of superconductors

    G. Ravikumar, T. V. Chandrasekhar Rao, P. K. Mishra, V. C. Sahni, S. S. Banerjee, A. K. Grover, S. Ramakrishnan, S. Bhattacharya, M. J. Higgins, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

    Physica C: Superconductivity and its Applications   298 ( 1-2 )   122 - 132   1998年3月

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    記述言語:英語   出版者・発行元:Elsevier  

    Magnetisation hysteresis of type II superconductors measured using SQUID-based Magnetic Property Measurement System (MPMS) made by Quantum Design is known to be affected by inhomogeneity in the external field. We present a new method, viz., half-scan technique, for measuring magnetisation hysteresis loops using MPMS. This technique circumvents the problems caused by field inhomogeneity. We have used this technique to measure magnetisation hysteresis loops in the peak-effect regime of superconducting CeRu2 and 2H-NbSe2. The magnetisation hysteresis obtained using half-scan technique is found to be significantly larger than that obtained by conventional MPMS measurements. At very low fields where the extent of field inhomogeneity is not significant and in the reversible region, the results of the half-scan technique are comparable to those obtained using conventional technique. Moreover, hysteresis measurements are shown to be independent of scan length used in the measurement, thus reaffirming that the results are unaffected by the field inhomogeneity. © 1998 Elsevier Science B.V.

    DOI: 10.1016/S0921-4534(98)00018-5

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  • A novel technique to measure magnetisation hysteresis curves in the peak-effect regime of superconductors (共著)

    Physica C   298 ( 1-2 )   122 - 132   1998年3月

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  • Vortex phase diagram of CeRu2

    M. Yoshizawa, H. Kitaichi, M. Nakamura, M. Hedo, Y. Inada, E. Yamamoto, Y. Haga, Y. Onuki, H. Sugawarad, H. Sato

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   305 - 306   1998年

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    記述言語:英語   出版者・発行元:Elsevier  

    Vortex phase diagram and peak effect have been investigated by the magnetization measurements for various CeRu2 samples with different quality. The peak effect survives even in the extremely qualified samples and in the magnetic field H∥〈1 1 1〉. Field dependence of the anomalous magnetization reveals that the strong-pinning region terminates at H* = 24 kOe and T* = 4.0 K, independent of the quality of sample. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0304-8853(97)00396-X

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  • Acoustic de Haas van Alphen effect of CeRu<sub>2</sub>(共著)

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   415 - 416   1998年

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  • De Haas-van Alphen Effect and Energy Band Structure in UB2

    Etsuji Yamamoto, Yoshinori Haga, Tetsuo Honma, Yoshihiko Inada, Dai Aoki, Masato Hedo, Yoshiyuki Yoshida, Hiroshi Yamagami, Yoshichika Onuki

    Journal of the Physical Society of Japan   67 ( 9 )   3171 - 3175   1998年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We grew a single crystal of UB2 with the hexagonal structure and observed the de Haas-van Alphen (dHvA) oscillation. All of the dHvA branches, which are about seven in number, are detected in the limited angle regions. They are well explained by the 5f-itinerant relativistic band theory with an exchange and correlation potential in a local density approximation. Namely, UB2 is a compensated metal with an equal number of electron and hole. The Fermi surface consists of two closed but corrugated Fermi surfaces. The cyclotron masses are moderately heavy, ranging from 1.2 to 7.7m0.

    DOI: 10.1143/JPSJ.67.3171

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  • De Haas-van Alphen Effect and Energy Band Structure in UB2

    Etsuji Yamamoto, Yoshinori Haga, Tetsuo Honma, Yoshihiko Inada, Dai Aoki, Masato Hedo, Yoshiyuki Yoshida, Hiroshi Yamagami, Yoshichika Onuki

    Journal of the Physical Society of Japan   67 ( 9 )   3171 - 3175   1998年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We grew a single crystal of UB2 with the hexagonal structure and observed the de Haas-van Alphen (dHvA) oscillation. All of the dHvA branches, which are about seven in number, are detected in the limited angle regions. They are well explained by the 5f-itinerant relativistic band theory with an exchange and correlation potential in a local density approximation. Namely, UB2 is a compensated metal with an equal number of electron and hole. The Fermi surface consists of two closed but corrugated Fermi surfaces. The cyclotron masses are moderately heavy, ranging from 1.2 to 7.7m0.

    DOI: 10.1143/JPSJ.67.3171

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  • De Haas-van Alphen Effect and Energy Band Structure in UB <sub>2</sub>(共著)

    Journal of the Physical Society of Japan   67 ( 9 )   3171 - 3175   1998年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.67.3171

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  • Peak Effect in CeRu2: Role of Crystalline Defects

    Masato Hedo, Yoshihiko Kobayashi, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Jun-Ichi Suzuki, Naoto Metoki, Yoshichika Onuki, Hitoshi Sugawara, Hideyuki Sato, Kenichi Tenya, Takashi Tayama, Hiroshi Amitsuka, Toshiro Sakakibara

    Journal of the Physical Society of Japan   67 ( 10 )   3561 - 3569   1998年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We measured the electrical resistivity in magnetic fields and the Hall voltage to understand the peak effect in a superconductor with the cubic structure CeRu2. Two samples with residual resistivity ratios of ρRT/ρ0 = 240 and 12 were prepared, and the experimental results in the superconducting mixed state were compared between them. The flux flow begins at a high field and the peak effect is observed in a very narrow window in the T vs. H phase diagram near the upper critical field Hc2 for the sample with ρRT/ρ0 = 240, while it starts at a lower field and the window where the peak effect is observed becomes wider for the sample with ρRT/ρ0 = 12. These characteristic features are mainly related to crystalline defects in the sample.

    DOI: 10.1143/JPSJ.67.3561

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  • Peak Effect in CeRu2: Role of Crystalline Defects

    Masato Hedo, Yoshihiko Kobayashi, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Jun-Ichi Suzuki, Naoto Metoki, Yoshichika Onuki, Hitoshi Sugawara, Hideyuki Sato, Kenichi Tenya, Takashi Tayama, Hiroshi Amitsuka, Toshiro Sakakibara

    Journal of the Physical Society of Japan   67 ( 10 )   3561 - 3569   1998年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We measured the electrical resistivity in magnetic fields and the Hall voltage to understand the peak effect in a superconductor with the cubic structure CeRu2. Two samples with residual resistivity ratios of ρRT/ρ0 = 240 and 12 were prepared, and the experimental results in the superconducting mixed state were compared between them. The flux flow begins at a high field and the peak effect is observed in a very narrow window in the T vs. H phase diagram near the upper critical field Hc2 for the sample with ρRT/ρ0 = 240, while it starts at a lower field and the window where the peak effect is observed becomes wider for the sample with ρRT/ρ0 = 12. These characteristic features are mainly related to crystalline defects in the sample.

    DOI: 10.1143/JPSJ.67.3561

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  • Peak Effect in CeRu <sub>2</sub>: Role of Crystalline Defects(共著)

    Journal of the Physical Society of Japan   67 ( 10 )   3561 - 3569   1998年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.67.3561

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  • Vortex phase diagram of CeRu<sub>2</sub>(共著)

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   305 - 306   1998年

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  • Acoustic de Haas van Alphen effect of CeRu2

    Takashi Suzuki, Noriki Okuda, Hiroshi Goshima, Toshizo Fujita, Masato Hedo, Yoshihiko Inada, Yoshichika Onuki, Etsuji Yamamoto, Yoshinori Haga

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   415 - 416   1998年

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    記述言語:英語   出版者・発行元:Elsevier  

    The quantum oscillation of symmetrized elastic moduli of CeRu2 has been measured by an ultrasonic technique not only in the normal conducting state but also in the superconducting mixed state which includes the field region where a peak effect appears in the magnetization curve. The angular dependence of the oscillation frequencies for various branches in the normal state is identical to that previously obtained from a magnetic dHvA experiment by Hedo et al. The angular dependence of the quantum-oscillation amplitude is discussed in terms of the electron-phonon coupling. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0304-8853(97)00339-9

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  • Superconducting Properties of CeRu2

    Masato Hedo, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki, Yuji Aoki, Tatsuma D. Matsuda, Hideyuki Sato, Saburo Takahashi

    Journal of the Physical Society of Japan   67 ( 1 )   272 - 279   1998年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have measured the specific heat and the magnetization in the superconducting mixed state of CeRu2 at low temperatures and in high magnetic fields. We have clarified a rich variety of superconducting properties such as the temperature dependence of the electronic specific heat and Maki parameters κ1, κ2 and κ3. From these experimental results, CeRu2 is concluded to be of the BCS-type in superconductivity. Nevertheless, interesting is the magnetic field dependence of the electronic specific heat at 0.5 K, indicating a √H like behavior in low fields and a H-linear dependence in high fields up to the upper critical field of 50 kOe. This characteristic specific heat is discussed on the basis of a microscopic theory by Brandt et al.

    DOI: 10.1143/JPSJ.67.272

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  • Superconducting Properties of CeRu<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   67 ( 1 )   272 - 279   1998年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.67.272

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  • Quantum oscillation in the superconducting vortex state of CeRu2

    Y. Inada, M. Hedo, K. Sakurai, E. Yamamoto, Y. Haga, Y. Onuki, S. Takahashi

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   389 - 390   1998年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have succeeded in growing high-quality single crystals of CeRu2 and have observed dHvA oscillations both in the normal and superconducting vortex (mixed) states. The detected dHvA frequencies have been well explained by the result of band-structure calculations. The dHvA frequency does not change in magnitude between the normal and superconducting states, while the cyclotron mass is reduced and the Dingle temperature is enhanced in the vortex state. The mass and the Dingle temperature depend on the magnetic field in the vortex state. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0304-8853(97)00917-7

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  • Quantum oscillation in the superconducting vortex state of CeRu<sub>2</sub>(共著)

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   389 - 390   1998年

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  • Manifestation of history-dependent critical currents via dc and ac magnetization measurements in single crystals of and

    G. Ravikumar, V. Sahni, P. Mishra, T. Chandrasekhar Rao, S. Banerjee, A. Grover, S. Ramakrishnan, S. Bhattacharya, M. Higgins, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

    Physical Review B - Condensed Matter and Materials Physics   57 ( 18 )   R11069 - R11072   1998年

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    記述言語:英語  

    A study of path dependent effects in single crystals of (Formula presented) and (Formula presented) shows that critical current density (Formula presented) of the vortex state depends on its thermomagnetic history over a very large part of (Formula presented) parameter space. The path dependence in (Formula presented) is absent above the peak position (i.e., (Formula presented) of the peak effect region, which we believe identifies the complete loss of order in the vortex structure. The highly disordered field cooled (FC) state can be healed into a relatively ordered vortex lattice by subjecting it to a large enough change in dc field (few tens of Oe) or by shaking the field cooled state with sufficient ac field (few Oe). © 1998 The American Physical Society.

    DOI: 10.1103/PhysRevB.57.R11069

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  • Manifestation of History-Dependent Critical Currents Via dc and ac Magnetization Measurements in Single Crystals of CeRu<sub>2</sub> and 2H-NbSe <sub>2</sub>(共著)

    Physical Review B   57 ( 18 )   R11069 - R11072   1998年

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  • De Haas-van Alphen effect and the antiferroquadrupolar ordering of PrPb3

    D. Aoki, Y. Katayama, R. Settai, Y. Inada, Y. Onuki, H. Harima, Z. Kletowski

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   365 - 366   1998年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have determined the Fermi surface properties of PrPb3 by a de Haas-van Alphen experiment. The cyclotron effective mass is extremely temperature dependent and highly anisotropic even for almost spherical Fermi surfaces, which is due to the antiferroquadrupolar ordering. © 1998 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0304-8853(97)00931-1

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  • De Haas-van Alphen effect and the antiferroquadrupolar ordering of PrPb <sub>3</sub>(共著)

    Journal of Magnetism and Magnetic Materials   177-181 ( 1 )   365 - 366   1998年

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  • Anomalous Field Dependence of Magnetic Penetration Depth in the Vortex State of CeRu2 Probed by Muon Spin Rotation

    A. Yamashita, K. Ishii, T. Yokoo, J. Akimitsu, M. Hedo, Y. Inada, Y. Ōnuki, E. Yamamoto, Y. Haga, R. Kadono

    Physical Review Letters   79 ( 19 )   3771 - 3774   1997年11月

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    記述言語:英語  

    Magnetic penetration depths in the mixed state of a heavy-fermion superconductor CeRu2 have been measured by muon spin rotation. An anomalous increase of the observed penetration depth associated with the hysteresis peak of magnetization strongly suggests a new vortex phase, possibly a generalized Fulde-Ferrel-Larkin-Ovchinnikov state, near the upper critical field. © 1997 The American Physical Society.

    DOI: 10.1103/PhysRevLett.79.3771

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  • Anomalous Field Dependence of Magnetic Penetration Depth in the Vortex State of CeRu<sub>2</sub> Probed by Muon Spin Rotation(共著)

    Physical Reviw Letter   79 ( 19 )   3771 - 3774   1997年11月

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  • 7a-YF-13 CeRu_2の真木パラメータ

    辺土 正人, 稲田 佳彦, 山本 悦嗣, 芳賀 芳範, 大貫 惇睦, 青木 勇二, 松田 達磨, 佐藤 英行, 高橋 三郎

    日本物理学会講演概要集   52 ( 2 )   1997年9月

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  • Effect of Field Inhomogeneity on the Magnetization Measurements in the Peak Effect Region of CeRu<sub>2</sub> Superconductor(共著)

    Physica C   276 ( 1-2 )   9 - 17   1997年3月

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  • Effect of field inhomogeneity on the magnetisation measurements in the peak effect region of CeRu2 superconductor

    G. Ravikumar, T. V. Chandrasekhar Rao, P. K. Mishra, V. C. Sahni, Subir Saha, S. S. Banerjee, N. G. Patil, A. K. Grover, S. Ramakrishnan, S. Bhattacharya, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

    Physica C: Superconductivity and its Applications   276 ( 1-2 )   9 - 17   1997年3月

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    記述言語:英語   出版者・発行元:Elsevier  

    Detailed magnetisation measurements are presented for a cubic Laves phase superconducting single crystal CeRu2. These measurements have been performed in the peak effect regime using Quantum Design SQUID Magnetic Property Measurement System (MPMS). To understand the influence of magnetic field inhomogeneity of this set up, on the measured magnetisation, all the data is recorded for different scan lengths. We clearly demonstrate that some of the anomalous magnetisation results reported in literature are artefacts of field inhomogeneity. We also present a model based on Critical State Model to simulate the effect of field inhomogeneity on the measured magnetisation.

    DOI: 10.1016/S0921-4534(97)00039-7

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  • AC and DC magnetisation studies of peak effect in a clean crystal of CeRu<sub>2</sub>(共著)

    Physica C   282 ( 4 )   2043 - 2044   1997年

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  • Superconducting property of single crystal U6Fe

    E. Yamamoto, Y. Haga, A. Nakamura, N. Kimura, Y. Inada, H. Sugawara, H. Sato, Y. Onuki

    Physica B: Condensed Matter   230-232   394 - 397   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have determined the lower and upper critical fields, Hc1 and Hc2 by measuring the DC magnetization, the AC susceptibility and the resistivity in fields for a superconductor U6Fe. The coherence length and the penetration depth are estimated as 50 and 2060 Å, respectively.

    DOI: 10.1016/S0921-4526(96)00732-6

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  • Superconducting property of single crystal U<sub>6</sub>Fe(共著)

    Physica B   230-232   394 - 397   1997年

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  • Study of dHvA effect in the superconducting mixed state of CeRu2

    M. Hedo, Y. Inada, T. Ishida, E. Yamamoto, Y. Haga, Y. Onuki, M. Higuchi, A. Hasegawa

    Physica B: Condensed Matter   237-238   215 - 217   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have succeeded in growing high-quality single crystals of CeRu2 and have observed dHvA oscillations both in the normal and superconducting mixed states. The detected dHvA frequencies, i.e. extremal cross-sectional areas of Fermi surfaces have been well explained by band structure calculations. The dHvA frequency between the normal and superconducting states does not change in magnitude, while the Dingle temperature increases in the mixed state. The cyclotron mass is found to become a little smaller in the mixed state than in the normal state.

    DOI: 10.1016/S0921-4526(97)00105-1

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  • Study of dHvA effect in the superconducting mixed state of CeRu<sub>2</sub>(共著)

    Physica B   237-238   215 - 217   1997年

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  • AC and DC magnetisation studies of peak effect in a clean crystal of CeRu2

    N. G. Patil, S. S. Banerjee, Subir Saha, K. Ghosh, S. Ramakrishnan, S. Bhattacharya, A. K. Grover, T. V. Chandrasekhar Rao, G. Ravikumar, P. K. Mishra, V. C. Sahni, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

    Physica C: Superconductivity and its Applications   282 ( 4 )   2043 - 2044   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    New magnetisation results on a clean crystal of cubic CeRu2 reveal that the magnetisation hysteresis anomaly below Hc2(T) involves two distinct steps.

    DOI: 10.1016/S0921-4534(97)01112-X

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  • Fermi Surface Properties and Metamagnetism in the Antiferroquadrupolar Compound PrPb3

    Dai Aoki, Yasuhisa Katayama, Rikio Settai, Yoshihiko Inada, Yoshichika Onuki, Hisatomo Harima, Zbigniew Kletowski

    Journal of the Physical Society of Japan   66 ( 12 )   3988 - 3995   1997年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have measured the de Haas-van Alphen effect of PrPb3 whose antiferroquadrupolar ordering occurs at 0.4 K. Main Fermi surfaces consist of four closed ones, which are almost spherical. These Fermi surfaces are the same as those of a non-f reference compound LaPb3 in topology, although the cyclotron effective masses are 2 to 6 times larger than those of LaPb3. The cyclotron effective masses are temperature-dependent, which starts gradually with decreasing the temperature below 1 K. A metamagnetic transition is also found to occur at about 70 kOe below 0.6 K through the magnetization, magnetostriction and AC susceptibility measurements. These phenomena are closely related to the antiferroquadrupolar ordering at 0.4 K.

    DOI: 10.1143/JPSJ.66.3988

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  • de Haas-van Alphen Oscillation in the Superconducting Mixed State of URu2Si2

    Hitoshi Ohkuni, Takashi Ishida, Yoshihiko Inada, Yoshichika Ōnuki, Yoshinori Haga, Etsuji Yamamoto, Yoshichika Ōnuki, Saburo Takahashi

    Journal of the Physical Society of Japan   66 ( 4 )   945 - 948   1997年

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    We have measured the magnetoresistance and de Haas-van Alphen (dHvA) oscillation of URu2Si2. From the results of the magnetoresistance measurement, URu2Si2 is concluded to be a compensated metal with closed Fermi surfaces. The dHvA branch, which corresponds to a nearly spherical Fermi surface, has been detected in both the normal and superconducting mixed states. The Dingle temperature or the electron scattering rate is found to be strongly enhanced and the cyclotron effective mass to be correspondingly reduced in the mixed state. © 1997, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

    DOI: 10.1143/JPSJ.66.945

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  • de Haas-van Alphen Oscillation in the Superconducting Mixed State of URu<sub>2</sub>Si<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   66 ( 4 )   945 - 948   1997年

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    DOI: 10.1143/JPSJ.66.945

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  • Mixed state transport properties and peak effect in f-electron superconductors

    H. Sato, Y. Aoki, Y. Kobayashi, H. R. Sato, T. Nishigaki, H. Sugawara, M. Hedo, Y. Inada, Y. Onuki

    Physica B: Condensed Matter   230-232   402 - 405   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have measured the electrical resistivity, Hall effect and transverse even voltage in the flux-flow state of CeRu2, CeCo2 and Yb3Rh4Sn13. In all the transport properties, we found a clear anomaly related with the peak effect, which was argued in relation to the inhomogeneous superconducting phase proposed by Fulde-Ferrell and Larkin-Ovchinnikov. The pinning force and the transverse even voltage depend largely on sample quality. A deviation from the ordinary BCS prediction, suggesting an anisotropy in the superconducting gap, has been found in the specific heat of CeCo2.

    DOI: 10.1016/S0921-4526(96)00734-X

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  • Mixed state transport properites and peak effect in f-electron superconductors(共著)

    Physica B   230-232   402 - 405   1997年

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  • Single crystal growth and superconducting properties of UPd2Al3

    Y. Haga, E. Yamamoto, Y. Inada, D. Aoki, K. Tenya, M. Ikeda, T. Sakakibara, Y. Onuki

    Physica B: Condensed Matter   230-232   357 - 359   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    Superconducting property of single crystalline UPd2Al3 has been studied by static magnetization, AC susceptibility and flux flow resistivity measurements. A pronounced peak structure is observed just below the superconducting upper critical field HC2. The peak consists of two structures at low temperatures, becomes one above 0.6 K and continues up to a low field of 0.1 T. These results are compared to those based on the FFLO model.

    DOI: 10.1016/S0921-4526(96)00720-X

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  • Single crystal growth and superconducting properties of UPd<sub>2</sub>Al<sub>3</sub>(共著)

    Physica B   230-232   357 - 359   1997年

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  • dHvA oscillation in the superconducting mixed state of CeRu2

    Y. Inada, M. Hedo, T. Ishida, E. Yamamoto, Y. Haga, Y. Onuki

    Physica B: Condensed Matter   230-232   387 - 390   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    We have succeeded in growing a high-quality single crystal of CeRu2 and dHvA oscillations have been clearly observed both in the normal and mixed states. The dHvA amplitude of a small dHvA frequency is reduced a little in the mixed state compared to that in the normal state, while that of a large dHvA frequency is reduced strongly. The cyclotron mass is found to become a little smaller in the mixed state than that in the normal state, although the cross-sectional area of the Fermi surface is unchanged from the normal state.

    DOI: 10.1016/S0921-4526(96)00730-2

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  • dHvA oscillation in the superconducting mixed state of CeRu<sub>2</sub>(共著)

    Physica B   230-232   387 - 390   1997年

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  • Giant lattice softening in the normal state of CeRu2

    Takashi Suzuki, Hiroshi Goshima, Shigenobu Sakita, Toshizo Fujita, Masato Hedo, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Yoshitika Ônuki

    Physica B: Condensed Matter   230-232   176 - 178   1997年

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    記述言語:英語   出版者・発行元:Elsevier  

    Elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C11 - C12)/2 and C44 show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus CB indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu2. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.

    DOI: 10.1016/S0921-4526(96)00582-0

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  • Giant lattice softning in the normal state of CeRu<sub>2</sub>(共著)

    Physica B   230-232   176 - 178   1997年

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  • Anomalous pinning in superconductors with strong Pauli paramagnetism(共著)

    Physica B   223-224 ( 1-4 )   28 - 32   1996年6月

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  • Anomalous pinning in superconductors with strong Pauli paramagnetism

    Y. Onuki, M. Hedo, Y. Inada, R. Settai, H. Sugawara, Y. Aoki, H. Sato, M. Deppe, P. Gegenwart, C. Geibel, M. Lang, T. Lühmann, R. Modler, M. Weiden, F. Steglich, C. Paulsen, J. L. Tholence, N. Sato, T. Komatsubara, M. Tachiki, S. Takahashi

    Physica B: Condensed Matter   223-224 ( 1-4 )   28 - 32   1996年6月

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    記述言語:英語   出版者・発行元:Elsevier  

    The results of the magnetization, magnetostriction and AC-susceptibility experiments are presented for both the antiferromagnetic heavy-Fermion superconductor UPd2Al3 and the valence fluctuation compound CeRu2. For (H &gt
    10 kOe). These results are discussed on the basis of a generalized Fulde-Ferrell-Larkin-Ovchinnikov superconducting state.

    DOI: 10.1016/0921-4526(96)00030-0

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  • 1a-pS-54 重い電子系超伝導物質UPd_2Al_3の単結晶育成と物性II(磁性(f電子系))

    芳賀 芳範, 山本 悦嗣, 木村 憲彰, 辺土 正人, 稲田 佳彦, 大貫 惇睦, 天谷 健一, 池田 昌隆, 榊 俊郎

    日本物理学会講演概要集. 年会   51 ( 3 )   108 - 108   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 3a-YF-1 PrPb_3のフェルミ面(磁性(f電子系))

    青木 大, 東 恒, メリケ アプリーズ, 摂待 力生, 稲田 佳彦, 大貫 惇睦, KLETOWSKI Zbigniew

    日本物理学会講演概要集. 年会   51 ( 3 )   223 - 223   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 3a-YB-2 CeNiSnの異方的磁気抵抗とギャップ状態(磁性(f電子系))

    稲田 佳彦, 東 恒, 青木 大, 摂待 力生, 大貫 惇睦, 小林 克志, 高畠 敏郎, 中本 剛, 藤井 博信, 前沢 邦彦

    日本物理学会講演概要集. 年会   51 ( 3 )   206 - 206   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 31a-YC-4 CeRu_2の超伝導状態でのdHvA振動とピーク効果(磁性(f電子系))

    辺土 正人, 木村 憲彰, 稲田 佳彦, 石田 崇史, 山本 悦嗣, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集. 年会   51 ( 3 )   2 - 2   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 31p-YC-7 U_6Feの超伝導(磁性(f電子系))

    山本 悦嗣, 芳賀 芳範, 中村 彰夫, 辺土 正人, 木村 憲彰, 稲田 佳彦, 大貫 惇睦

    日本物理学会講演概要集. 年会   51 ( 3 )   36 - 36   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • 31a-YC-3 CeRu_2の異常な混合状態と異方性(磁性(f電子系))

    五嶋 宏史, 鈴木 孝至, 藤田 敏三, 辺土 正人, 稲田 佳彦, 山本 悦嗣, 芳賀 芳範, 大貫 惇睦

    日本物理学会講演概要集. 年会   51 ( 3 )   2 - 2   1996年3月

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    記述言語:日本語   出版者・発行元:一般社団法人日本物理学会  

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  • Thermal Expansion and Magnetostriction of Single-Crystalline CeRu<sub>2</sub>(共著)

    Czech. J. Phys.   46 ( 4 )   2149 - 2150   1996年

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    記述言語:英語  

    DOI: 10.1007/BF02571066

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  • Magnetoresistance and the Anisotropic Hybridization Gap in CeNiSn

    Yoshihiko Inada, Hisashi Azuma, Rikio Settai, Dai Aoki, Yoshichika Onuki, Katsushi Kobayashi, Toshiro Takabatake, Go Nakamoto, Hironobu Fujii, Kunihiko Maezawa

    Journal of the Physical Society of Japan   65 ( 5 )   1158 - 1161   1996年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    We have measured the magnetoresistance of the orthorhombic CeNiSn at high fields up to 15 T and at low temperatures down to 0.4 K. The positive magnetoresistance is found to become dominant with the decrease of temperature for the magnetic field H applied along the b- and c-axes in the transverse configuration between the current J and the field H (J ⊥ H). On the other hand, the longitudinal magnetoresistance (J ∥ H) is small in magnitude for H ∥ b and c. For H ∥ a, the magnetoresistance is negative for any current direction. These experimental results have been discussed on the basis of the cyclotron motion of the compensated carriers with closed Fermi surfaces and the reduction of the anisotropic hybridization gap.

    DOI: 10.1143/JPSJ.65.1158

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  • Magnetoresistance and the Anisotropic Hybridization Gap in CeNiSn(共著)

    Journal of the Physical Society of Japan   65 ( 5 )   1158 - 1161   1996年

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    DOI: 10.1143/JPSJ.65.1158

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  • Single Crystal Growth, Normal and Superconducting Properties of UPd2Al3

    Yoshinori Haga, Etsuji Yamamoto, Yoshihiko Inada, Dai Aoki, Kenichi Tenya, Masataka Ikeda, Toshiro Sakakibara, Yoshichika Onuki

    Journal of the Physical Society of Japan   65 ( 11 )   3646 - 3653   1996年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    Normal and superconducting properties of single crystalline UPd2Al3 have been studied by static magnetization, AC susceptibility and magnetoresistance measurements. In the normal state, an open orbit is found to exist along the [0001] direction from a saturated magnetoresistance. In the superconducting state, a pronounced peak effect is observed just below the upper critical field Hc2. The peak consists of two structures at low temperatures, becomes one above 0.6 K and continues up to a low field of 0.1 T. These experimental results are compared to those based on the FFLO model. The paramagnetic effect in superconductivity is also found by the static magnetization measurement.

    DOI: 10.1143/JPSJ.65.3646

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  • Single Crystal Growth, Normal and Superconducting Properties of UPd<sub>2</sub>Al<sub>3</sub>(共著)

    Journal of the Physical Society of Japan   65 ( 11 )   3646 - 3653   1996年

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    DOI: 10.1143/JPSJ.65.3646

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  • Huge Lattice Softening in CeRu2 without Structural Transition

    Takashi Suzuki, Hiroshi Goshima, Shigenobu Sakita, Toshizo Fujita, Masato Hedo, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Önuki

    Journal of the Physical Society of Japan   65 ( 9 )   2753 - 2756   1996年

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    記述言語:英語   出版者・発行元:Physical Society of Japan  

    Symmetrized elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by means of an ultrasonic technique. Both transverse moduli (C11 -C12)/2 and C44 soften markedly from 300 to ∼20 K without structural transition. In contrast, the bulk modulus CB shows a normal temperature dependence without softening. These results indicate that there exists a marked structural fluctuation corresponding to a pure transverse strain in the normal conducting state of CeRu2. Our analysis, taking account of the deformation potential coupling, reveals that a narrow band with relatively high density of states at EF is responsible for the huge lattice softening.

    DOI: 10.1143/JPSJ.65.2753

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  • Huge Lattice Softning in CeRu<sub>2</sub> without Structural Transition(共著)

    Journal of the Physical Society of Japan   65 ( 9 )   2753 - 2756   1996年

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    DOI: 10.1143/JPSJ.65.2753

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  • Thermal expansion and magnetostriction of single-crystalline CeRu2

    H. Goshima, T. S. Suzuki, T. Fujita, M. Hedo, Y. Inada, E. Yamamoto, Y. Haga, Y. Ônuki

    Czechoslovak Journal of Physics   46 ( 4 )   2149 - 2150   1996年

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    記述言語:英語  

    We have measured thermal expansion and magnetostriction of single-crystalline CeRu2 z. Pressure dependence of Tc and the pinning mechanism of flux lines are discussed.

    DOI: 10.1007/BF02571066

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  • Fermi surface of the heavy-fermion superconductor UPd<sub>2</sub>Al<sub>3</sub>(共著)

    Physica B   206-207 ( C )   33 - 36   1995年2月

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  • Fermi surface of the heavy-fermion superconductor UPd2Al3

    Y. Inada, A. Ishiguro, J. Kimura, N. Sato, A. Sawada, T. Komatsubara, H. Yamagami

    Physica B: Physics of Condensed Matter   206-207 ( C )   33 - 36   1995年2月

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    UPd2Al3 is a heavy fermion superconductor with Tc ≊ 2 K co-existent with an antiferromagnetically ordered state (TN = 14.5 K. We report the angular dependence of the dHvA frequency, the effective cyclotron mass and the Dingle temperature. A comparison of the experimental results with band-structure calculations is made, revealing that 5f electrons in UPd2Al3 are fairly itinerant. © 1995.

    DOI: 10.1016/0921-4526(94)00360-8

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  • Anomalous Superconductibity of UPd<sub>2</sub>Al<sub>3</sub> near the Upper Critical Field(共著)

    Journal of the Physical Society of Japan   64 ( 2 )   378 - 382   1995年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.64.378

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  • de Haas-van Alphen Oscillation in Both Normal and Superconducting Mixed States of CeRu2

    Masato Hedo, Yoshihiko Inada, Takashi Ishida, Yoshichika Ōnuki, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Ōnuki, Masahiko Higuchi, Akira Hasegawa

    Journal of the Physical Society of Japan   64 ( 12 )   4535 - 4539   1995年

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    記述言語:英語  

    We have observed the de Haas-van Alphen (dHvA) oscillation in both the normal and superconducting mixed states of CeRu2. The dHvA amplitude in the mixed state is extremely reduced for the large cyclotron orbit or the carrier with a large cross-sectional area of the Fermi surface compared to the small one. We have detected three dHvA branches, ranging from 6 × 105 Oe to 2.3 × 107 Oe. The origin of these branches is well explained by the 4f-itinerant band model. © 1995, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

    DOI: 10.1143/JPSJ.64.4535

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  • de Haas-van Alphen Oscillation in Both Normal and Superconducting Mixed State of CeRu<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   64 ( 12 )   4535 - 4539   1995年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.64.4535

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  • de Haas-van Alphen Oscillation in Both Normal and Superconducting Mixed State of CeRu<sub>2</sub>(共著)

    Journal of the Physical Society of Japan   64 ( 12 )   4535 - 4539   1995年

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    記述言語:英語  

    DOI: 10.1143/JPSJ.64.4535

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  • Anomalous Susceptibility of UPd2Al3 near the Upper Critical Field

    Akiko Ishiguro, Anju Sawada, Yoshihiko Inada, Junko Kimura, Michiro Suzuki, Noriaki Sato, Takemi Komatsubara

    Journal of the Physical Society of Japan   64 ( 2 )   378 - 382   1995年

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    記述言語:英語  

    The ac susceptibility of the heavy fermion superconductor UPd2 Al3 has been measured. The peak of the susceptibility has been observed in the vicinity of the upper critical field. This anomaly is explained by the flux pinning rather than by the Fulde-Ferrell state. © 1995, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

    DOI: 10.1143/JPSJ.64.378

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  • Anomalous Superconduc tibity of UPd<sub>2</sub>Al<sub>3</sub> near the Upper Critical Field(共著)

    Journal of the Physical Society of Japan   64 ( 2 )   378 - 382   1995年

     詳細を見る

    記述言語:英語  

    DOI: 10.1143/JPSJ.64.378

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  • An anomaly in the superconducting phase of UPd<sub>2</sub>Al<sub>3</sub>(共著)

    Physica B   199-200 ( C )   122 - 124   1994年4月

     詳細を見る

  • An anomaly in the superconducting phase of UPd2Al3

    N. Sato, K. Imamura, T. Sakon, Y. Inada, A. Sawada, T. Komatsubara, H. Matsui, T. Goto

    Physica B: Physics of Condensed Matter   199-200 ( C )   122 - 124   1994年4月

     詳細を見る

    記述言語:英語  

    We reported previously that an anomaly appeared in the specific heat of UPd2Al3.03 in the superconducting state. An anomaly has also been observed in the thermal expansion of a sample, which was cut from the same ingot of UPd2Al3.03 revealing de Haas-van Alphen oscillations. The temperature dependence of the magnetic susceptibility of La0.25U0.75Pd2Al3 shows no peak down to about 5 K contrary to that of UPd2Al3, implying a nonsinglet ground state. © 1994.

    DOI: 10.1016/0921-4526(94)91755-8

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  • 重い電子系超伝導化合物UPd<sub>2</sub>Al<sub>3</sub>のdHvA効果 (III)

    稲田佳彦, 石黒晶子, 木村純子, 佐藤憲昭, 鈴木三千郎, 沢田安樹, 小松原武美, 山上浩志

    日本物理学会講演概要集(分科会)   1994 ( Autumn Pt 3 )   1994年

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  • dHvA measurement in a semimetallic compound U<sub>3</sub>P<sub>4</sub>(共著)

    Physica B   186-188 ( C )   761 - 763   1993年5月

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  • Superconductivity and magnetism in a single crystal of UPd2Al3

    N. Sato, T. Sakon, K. Imamura, Y. Inada, H. Aono, T. Komatsubara

    Physica B: Physics of Condensed Matter   186-188 ( C )   195 - 200   1993年5月

     詳細を見る

    記述言語:英語  

    We present the experimental results of the electrical resistivity under high pressure, magnetic susceptibility and specific heat of single crystalline compounds of nominal composition UPd2Al3 and UPd2Al3.03. From an analysis of the magnetic and superconducting properties, we suggest that the crystalline electric field effect plays an important role in magnetic properties, that the superconducting state has a singlet nature of pairing and that there exist gap zeros on lines on the Fermi surface. Anomalous features in UPd2Al3.03 are also presented. © 1993.

    DOI: 10.1016/0921-4526(93)90532-B

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  • Superconductivity and magnetism in a single crystal of UPd<sub>2</sub>Al<sub>3</sub>(共著)

    Physica B   186-188 ( C )   195 - 200   1993年5月

     詳細を見る

  • dHvA measurement in a semimetallic compound U3P4

    Y. Inada, H. Aono, N. Takeda, N. Sato, A. Sawada, M. Suzuki, T. Suzuki, T. Komatsubara

    Physica B: Physics of Condensed Matter   186-188 ( C )   761 - 763   1993年5月

     詳細を見る

    記述言語:英語  

    We report de Haas-van Alphen (dHvA) measurements with a 3He-4He dilution refrigerator in U3P4. The uranium compound U3P4 crystallizes in the BCC Th3P4-type structure with a space group Td6 (I43d). This compound is ferromagnetic below 137 K with a complex triaxial magnetic structure. Our measurements reveal new sheets of the Fermi surface which have heavy cyclotron effective masses and suggest open orbitsin the (111) plane. We have clarified that the Fermi surfaces of U3P4 are not so simple as those expected before. © 1993.

    DOI: 10.1016/0921-4526(93)90696-4

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  • A New Method to Observe de Haas-van Alphen Oscillations with a Superconducting Quantum Interference Device(共著)

    Noriaki Sato, hideki Aono, Yoshihiko Inada, Anjyu Sawada, Takemi Komatsubara

    Japan Journal of Applied Physics   32 ( 2A )   L207 - L210   1993年2月

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    記述言語:英語  

    Web of Science

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  • New silver powders with large surface area as heat exchanger materials(共著)

    Cryogenics   31 ( 6 )   453 - 455   1991年

     詳細を見る

  • New silver powders with large surface area as heat exchanger materials

    W. Itoh, A. Sawada, A. Shinozaki, Y. Inada

    Cryogenics   31 ( 6 )   453 - 455   1991年

     詳細を見る

    記述言語:英語  

    The properties of several silver powders made by chemical processing, such as surface area, electrical resistivity and the Kapitza resistance with liquid 3He, have been measured. The results indicate that the finest new powder (C-8), with a large specific surface area (6 m2 g-1), is suitable for use as a heat exchanger material at ultralow temperatures. © 1991.

    DOI: 10.1016/0011-2275(91)90207-D

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▼全件表示

講演・口頭発表等

  • 11B &195Pt NMR study of the superconductor Li2(Pd1-xPtx)3B without inversion symmetry

    22nd International Symposium on Superconductivity  2010年 

     詳細を見る

  • 空間反転対称性の破れた超伝導体Li2(Pd1-xPtx)3BのNMRによる研究(5)

    第65回日本物理学会年次大会  2010年 

     詳細を見る

  • Superconducting Phase Diagram of Li2(Pd1-xPtx)3B for High x

    第65回日本物理学会年次大会  2010年 

     詳細を見る

  • 空間反転対称性の破れた超伝導体Li2Pt3Bの低温比熱

    第65回日本物理学会年次大会  2010年 

     詳細を見る

  • Sample dependence of the superconductivity in Li2Pt3B

    第65回日本物理学会年次大会  2010年 

     詳細を見る

  • U3P4の圧力誘起強磁性・非磁性転移

    第65回日本物理学会年次大会  2010年 

     詳細を見る

  • 空間反転対称性のない超伝導体Li2T3B (T = Pd,Pt)における非磁性不純物効果

    2010年日本物理学会秋期大会  2010年 

     詳細を見る

  • 空間反転対称性の破れた超伝導体Li2(Pd1-xPtx)3BのNMRによる研究(6)

    2010年日本物理学会秋期大会  2010年 

     詳細を見る

  • Superconducting Phase Diagram of Li2(Pd1-xPtx)3B for High x

    2010年 

     詳細を見る

  • Sample dependence of the superconductivity in Li2Pt3B

    2010年 

     詳細を見る

  • 11B &195Pt NMR study of the superconductor Li2(Pd1-xPtx)3B without inversion symmetry

    22nd International Symposium on Superconductivity  2010年 

     詳細を見る

  • 未来の科学者養成講座「科学先取り岡山コース」における物理分野の取り組みII

    2010年日本物理学会秋期大会  2010年 

     詳細を見る

  • Crossover in superconducting nature of Li2(Pd1-xPtx)3B

    日本物理学会第64会年次大会  2009年 

     詳細を見る

  • 空間反転対称性が破れた超伝導体Li2(Pd1-x Ptx)3BのNMRによる研究(3)

    日本物理学会第64会年次大会  2009年 

     詳細を見る

  • Pressure Effect on TN in SmMIn5 (M = Co, Rh, Ir)

    International Conference on Magnetism 2009  2009年 

     詳細を見る

  • Crossover of Spin Triplet and Singlet Pair in Superconducting of Li2(Pd1−xPtx)3B (x = 0-1)

    International Conference on Magnetism 2009  2009年 

     詳細を見る

  • SmCo1-xTxIn5(T=Ni,Fe)の物性に関する研究

    日本物理学会秋季大会  2009年 

     詳細を見る

  • 空間反転対称性の破れた超伝導体Li2(Pd1-x Ptx)3BのNMRによる研究(4)

    日本物理学会秋季大会  2009年 

     詳細を見る

  • Crossover nature in superconducting state of Li2(Pt1-xPdx)3B (x=0-1) II

    日本物理学会秋季大会  2009年 

     詳細を見る

  • 未来の科学者養成講座「科学先取り岡山コース」における物理分野の取り組み

    日本物理学会秋季大会  2009年 

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  • 岡山大学教職大学院における実習日誌の分析法の検討 ー記述内容の集約と可視化への前処理ー

    第12回日本教育実践学会  2009年 

     詳細を見る

  • 遍歴強磁性体U3P4の圧力効果

    日本物理学会第64会年次大会  2009年 

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  • 教職大学院専用遠隔教育研究指導システムの開発と試用結果の考察

    日本教育工学会第24回全国大会  2008年 

     詳細を見る

  • 空間反転対称性が破れたLi2(Pd1-xPtx)3BのNMR法による研究

    第63会年次大会  2008年 

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  • 教職大学院の学部新卒者を想定した「学校における課題発見実習」の試行の一検討

    日本教育工学会研究会  2008年 

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  • 教職大学院生を想定した教育実習日誌の分析結果とその可視化の検討

    日本科学教育学会第32回年会  2008年 

     詳細を見る

  • Optical Emission Spectra for Radiation Defects in Al2O3 by Reactor Neutron Irradiation

    日本物理学会中国支部・四国支部大会  2008年 

     詳細を見る

  • 空間反転対称性が破れたLi2(Pd1-xPtx)3BのNMR法による研究2

    日本物理学会2008年秋季大会  2008年 

     詳細を見る

  • 空間反転対称性を有しないLi2(Pd,Pt)3Bの超伝導

    日本物理学会春季大会  2007年 

     詳細を見る

  • 超伝導体Li2(Pd1-xPtx)3B (x=0-1)のクロスオーバーの研究

    日本物理学会第62会年次大会  2007年 

     詳細を見る

  • SmCo(SnxIn1-x)5とSmCo(GaxIn1-x)5の物性研究

    日本物理学会第62会年次大会  2007年 

     詳細を見る

  • 反転対称性の無い超伝導体Li2(Pd1-x Ptx)3BのNMRによる研究

    日本物理学会第62会年次大会  2007年 

     詳細を見る

  • 岡山大学教育学研究科理科教育専攻で試行する課題提案型教育実践プログラム

    日本物理教育学会中国四国支部大会  2007年 

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  • SSH指定校倉敷天城高校の海外授業実践報告-粒子概念を意識した潜熱に関する実験-

    日本理科教育学会第55回中国支部大会  2006年 

     詳細を見る

  • 超伝導体Li2Pt3Bの11B NMRによる研究

    日本物理学会 春  2006年 

     詳細を見る

  • SmMSnxIn5-x(M:Co,Rh,Ir)の伝導と磁性に関する研究

    日本物理学会 春  2006年 

     詳細を見る

  • RAgSb2(R=Cex,La1-x)の電気伝導の異常とフェルミ面

    日本物理学会 春  2006年 

     詳細を見る

  • 「エネルギーって何だろう?」-小学校におけるエネルギーをテーマにした教材開発と授業実践の試み-

    日本理科教育学会第55回中国支部大会  2006年 

     詳細を見る

  • 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 秋  2005年 

     詳細を見る

  • SmTIn5の高圧下輸送特性

    日本物理学会 秋  2005年 

     詳細を見る

  • 超伝導体Li2Pt3Bの11B NMRによる研究

    日本物理学会 秋  2005年 

     詳細を見る

  • SmTIn5(T=Co,Rh,Ir)の単結晶育成と物性

    日本物理学会 秋  2005年 

     詳細を見る

  • RAgSb2(R=Ce,La)の異方性

    日本物理学会 秋  2005年 

     詳細を見る

  • SmTIn5(T=Co,Rh,Ir)の単結晶育成と物性II

    日本物理学会 秋  2005年 

     詳細を見る

  • CeTIn5(T = Ir, Co)の低磁場直流帯確率

    日本物理学会第58回年次大会  2003年 

     詳細を見る

  • 反強磁性物質UNiSb2の物性

    日本物理学会第58回年次大会  2003年 

     詳細を見る

  • CeRh3B2とLaRh3B2のドハース・ファンアルフェン効果

    日本物理学会第58回年次大会  2003年 

     詳細を見る

  • CeCoIn5の加圧力下でのドハース・ファンアルフェン効果

    日本物理学会2003年春  2003年 

     詳細を見る

  • Ce2RhIn8の圧力誘起超伝導

    日本物理学会2003年春  2003年 

     詳細を見る

  • CeTIn5(T=Ir,Co)の低磁場直流帯磁率

    日本物理学会2003年春  2003年 

     詳細を見る

  • 反強磁性物質UNiSb2の物性

    日本物理学会2003年春  2003年 

     詳細を見る

  • CeRh3B2とLaRh3B2のドハース・ファンアルフェン効果

    日本物理学会2003年春  2003年 

     詳細を見る

  • XMCDによる強磁性超伝導体UGe2の研究

    日本物理学会  2003年 

     詳細を見る

  • CeCoIn5の加圧下でのドハース・ファンアルフェン効果

    日本物理学会第58回年次大会  2003年 

     詳細を見る

  • 磁性体CeNiGe2の単結晶育成と物性

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • CeIrIn5における二つの超伝導転移

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • UPtGa5のフェルミ面とその物性

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • CeAgSb2とLaAgSb2のフェルミ面

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • CeRh3B2のドハース・ファンアルフェン効果と磁気抵抗

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • CeRhIn5とCe2rhIn8の加圧下でのドハース・ファンアルフェン効果

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • PrOs4Sb12のドハース・ファンアルフェン効果

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • 磁気コンプトン散乱による強磁性CeRh3B2の研究

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • URhGe単結晶育成と物性?

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • Fermi surface properties in U3P4 and U3As4

    Polish-Japanese Workshop  2002年 

     詳細を見る

  • Quasi-2D Fermi surfaces of the magnetic compound CeAgSb2

    the International Conference on Strongly Correlated Electron Systems SCES' 02  2002年 

     詳細を見る

  • de Haas-van Alphen effect and magnetoresistance in CeRh3B2

    the 23rd International Conference on Low Temperature Physics, LT23  2002年 

     詳細を見る

  • 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年 

     詳細を見る

  • Electrical and Magnetic Properties of CeTSb2 (T = Au, Cu and Ni) Single Crystals

    日本物理学会2002年秋季大会  2002年 

     詳細を見る

  • CeCoIn5の量子臨界点での物性

    日本物理学会・2001年秋  2001年 

     詳細を見る

  • 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  2001年 

     詳細を見る

  • UIrの物性

    日本物理学会・2001年秋  2001年 

     詳細を見る

  • RAg2の純良単結晶育成と磁性2

    日本物理学会・2001年秋  2001年 

     詳細を見る

  • MgB2の単結晶育成と物性

    日本物理学会・2001年秋  2001年 

     詳細を見る

  • CeRu2の磁束格子状態における高磁場での異常な準粒子励起

    日本物理学会・2001年春  2001年 

     詳細を見る

  • CeIrIn5-s波超伝導体間のジョセフソン効果II

    日本物理学会・2001年春  2001年 

     詳細を見る

  • 微細加工を用いた点接触型素子の製作

    日本物理学会・2001年秋  2001年 

     詳細を見る

  • 高圧下におけるU3P4とU3As4の電気抵抗測定

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • 重い電子系超伝導体CeIrIn5の準二次元フェルミ面

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • CeRhIn5のドハース・ファンアルフェン効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • UNiGa5の単結晶育成と物性

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • UIrの単結晶育成と物性

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • PrFe4P12のドハース・ファンアルフェン効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • PrRu4Sb12のドハース・ファンアルフェン効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • 圧力誘起超伝導体CeRhIn5の高圧下NQR

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • CeIrIn5-s波超伝導体間のジョセフソン効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • 重い電子系超伝導体UPd2Al3の異方性

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • SbSb2のドハースファンアルフェン効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • UNi5,UNiSn2,U2Ga3の単結晶育成と物性

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • UP2のシュブニコフ・ドハース効果

    日本物理学会・2000年秋  2000年 

     詳細を見る

  • URu2Si2の超伝導磁化測定

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • UPd3の四極子秩序とドハース・ファンアルフェン効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • URu2Si2の超伝導混合状態でのドハースファンアルフェン効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • UPd2Al3の超伝導混合状態におけるdHvA効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • PrSn3のドハース・ファンアルフェン効果II

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • RIn3(R=Yb, Dy, Ho, Er) のドハース・ファンアルフェン効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • フラックス法によるUGa3, USn3, UPb3, UCd11, UBi2の単結晶育成と電子物性

    日本物理学会・1999年春  1999年 

     詳細を見る

  • UB4のドハース・ファンアルフェン効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • 強磁性体UGa2の磁気抵抗とdHvA効果

    日本物理学会・1999年春  1999年 

     詳細を見る

  • UCのドハース・ファンアルフェン効果とフェルミ面

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • USb2とUBi2の2次元フェルミ面と磁気ブリルアンゾーン

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • UAs2とUP2のシュブニコフ・ドハース振動

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • 強磁性体UGa2のフェルミオロジー

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • CeNiの圧力下でのドハース・ファンアルフェン効果

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • 超伝導混合状態でのドハースファンアルフェン効果

    日本物理学会・1999年秋  1999年 

     詳細を見る

  • U3As4の純良単結晶育成とフェルミ面

    日本物理学会・1999年秋  1999年 

     詳細を見る

▼全件表示

 

担当授業科目

  • 中等理科内容構成Ⅰ (2021年度) 第1学期  - 火3,火4

  • 中等理科内容構成Ⅲ (2021年度) 3・4学期  - その他

  • 中等理科内容論(力学・熱力学Ⅰ) (2021年度) 第1学期  - 木5~6

  • 中等理科内容論(力学・熱力学Ⅱ) (2021年度) 第2学期  - 木5~6

  • 中等理科内容論(物理学実験A) (2021年度) 3・4学期  - 金1~4

  • 中等理科内容論(物理学実験B) (2021年度) 3・4学期  - 金1~4

  • 中等理科内容論(物理学概論A) (2021年度) 第3学期  - 木7,木8

  • 中等理科内容論(物理学概論B) (2021年度) 第4学期  - 木7,木8

  • 中等理科内容論(物理学研究) (2021年度) 1~4学期  - その他

  • 中等理科内容論(物理学)A (2021年度) 第1学期  - 月1,月2

  • 中等理科内容論(物理学)B (2021年度) 第2学期  - 月1,月2

  • 中等理科内容論(現代物理学Ⅰ) (2021年度) 第1学期  - 月3~4

  • 中等理科内容論(現代物理学Ⅱ) (2021年度) 第2学期  - 月3~4

  • 中等理科内容開発(物理学)A (2021年度) 3・4学期  - その他

  • 中等理科内容開発(物理学)B (2021年度) 3・4学期  - その他

  • 低温相関物性学 (2021年度) 後期  - その他

  • 初等理科内容構成 (2021年度) 3・4学期  - その他

  • 初等理科内容研究A (2021年度) 第3学期  - 火3,火4

  • 初等理科内容論 (2021年度) 第3学期  - 火3,火4

  • 力学・熱力学(1) (2021年度) 第1学期  - 木5~6

  • 力学・熱力学(2) (2021年度) 第2学期  - 木5~6

  • 学問の方法 (2021年度) 第1学期  - 火1~2

  • 教育科学の理念と今日的課題B (2021年度) 第1学期  - 金1,金2

  • 教育科学プロジェクト研究概論 (2021年度) 第1学期  - 火1,火2

  • 教育科学特論演習(物理学ⅡA) (2021年度) 1~4学期  - その他

  • 教育科学特論演習(物理学ⅡB) (2021年度) 1~4学期  - その他

  • 教育科学特論(物理学ⅡA) (2021年度) 1~4学期  - その他

  • 教育科学特論(物理学ⅡB) (2021年度) 1~4学期  - その他

  • 教育科学課題研究 (2021年度) 1~4学期  - その他

  • 教養物理学(初等電磁気学)1 (2021年度) 第3学期  - 木5~6

  • 教養物理学(初等電磁気学)2 (2021年度) 第4学期  - 木5~6

  • 数理・データサイエンスの基礎 (2021年度) 第3学期  - 木3~4

  • 数理・データサイエンスの基礎 (2021年度) 第3学期  - 木3~4

  • 極限環境物理学演習 (2021年度) 通年  - その他

  • 物性科学Ⅰ (2021年度) 特別  - その他

  • 物性科学Ⅱ (2021年度) 特別  - その他

  • 物理学実験(コンピュータ活用を含む)A (2021年度) 3・4学期  - その他

  • 物理学実験(コンピュータ活用を含む)B (2021年度) 3・4学期  - その他

  • 物理学概論A (2021年度) 第3学期  - 木7,木8

  • 物理学概論B (2021年度) 第4学期  - 木7,木8

  • 物理学研究 (2021年度) 特別  - その他

  • 現代物理学(1) (2021年度) 第1学期  - 月3~4

  • 現代物理学(2) (2021年度) 第2学期  - 月3~4

  • 理科基礎(物理学) (2021年度) 第1学期  - 木7,木8

  • 理科基礎(物理学) (2021年度) 第1学期  - 木7,木8

  • PBLⅠ (2021年度) 第2学期  - 火1,火2

  • PBLⅡ (2021年度) 第3学期  - 火1,火2

  • PBLⅢ (2021年度) 第4学期  - 火1,火2

  • PBL特論Ⅰ (2021年度) 第1学期  - 金5,金6

  • PBL特論Ⅱ (2021年度) 第2学期  - その他

  • PBL特論Ⅲ (2021年度) 第3学期  - その他

  • PBL特論Ⅳ (2021年度) 第4学期  - その他

  • PBL特論Ⅴ (2021年度) 第1学期  - その他

  • PBL特論Ⅵ (2021年度) 第2学期  - その他

  • PBL特論Ⅶ (2021年度) 第3学期  - その他

  • PBL特論Ⅷ (2021年度) 第4学期  - その他

  • 中等理科内容構成Ⅰ (2020年度) 第1学期  - 火3,火4

  • 中等理科内容論(物理学実験A) (2020年度) 3・4学期  - その他

  • 中等理科内容論(物理学実験B) (2020年度) 3・4学期  - その他

  • 中等理科内容論(物理学概論A) (2020年度) 第3学期  - 木7,木8

  • 中等理科内容論(物理学概論B) (2020年度) 第4学期  - 木7,木8

  • 中等理科内容論(物理学)A (2020年度) 第1学期  - 月1,月2

  • 中等理科内容論(物理学)B (2020年度) 第2学期  - 月1,月2

  • 中等理科内容開発(物理学)A (2020年度) 3・4学期  - その他

  • 中等理科内容開発(物理学)B (2020年度) 3・4学期  - その他

  • 低温相関物性学 (2020年度) 後期  - その他

  • 初等理科内容研究A (2020年度) 第3学期  - 火3,火4

  • 初等理科内容論 (2020年度) 第3学期  - 火3,火4

  • 学問の方法 (2020年度) 第1学期  - 火1,火2

  • 教育科学の理念と今日的課題B (2020年度) 第1学期  - 金1,金2

  • 教育科学プロジェクト研究概論 (2020年度) 第1学期  - 火1,火2

  • 教育科学特論(物理学ⅠA) (2020年度) 第1学期  - 月7,月8

  • 教育科学特論(物理学ⅠB) (2020年度) 第2学期  - 月7,月8

  • 教育科学課題研究 (2020年度) 1~4学期  - その他

  • 教養物理学(初等電磁気学)1 (2020年度) 第3学期  - 木5,木6

  • 教養物理学(初等電磁気学)2 (2020年度) 第4学期  - 木5,木6

  • 数理・データサイエンスの基礎 (2020年度) 第3学期  - 木3,木4

  • 極限環境物理学演習 (2020年度) 通年  - その他

  • 物性科学Ⅰ (2020年度) 第1学期  - その他

  • 物性科学Ⅱ (2020年度) 第2学期  - その他

  • 物理学実験(コンピュータ活用を含む)A (2020年度) 3・4学期  - その他

  • 物理学実験(コンピュータ活用を含む)B (2020年度) 3・4学期  - その他

  • 物理学概論 (2020年度) その他  - [第3学期], [第4学期]

  • 物理学概論A (2020年度) 第3学期  - 木7,木8

  • 物理学概論B (2020年度) 第4学期  - 木7,木8

  • 物理学研究 (2020年度) 特別  - その他

  • 理科基礎(物理学) (2020年度) 第1学期  - 木7,木8

  • 理科基礎(物理学) (2020年度) 第1学期  - 木7,木8

  • PBLⅠ (2020年度) 第2学期  - 火1,火2

  • PBLⅡ (2020年度) 第3学期  - 火1,火2

  • PBLⅢ (2020年度) 第4学期  - 火1,火2

  • PBL特論Ⅰ (2020年度) 第1学期  - 金5,金6

  • PBL特論Ⅱ (2020年度) 第2学期  - その他

  • PBL特論Ⅲ (2020年度) 第3学期  - その他

  • PBL特論Ⅳ (2020年度) 第4学期  - その他

  • PBL特論Ⅴ (2020年度) 第1学期  - その他

  • PBL特論Ⅵ (2020年度) 第2学期  - その他

  • PBL特論Ⅶ (2020年度) 第3学期  - その他

  • PBL特論Ⅷ (2020年度) 第4学期  - その他

▼全件表示