Updated on 2024/10/09

写真a

 
Rathi Ashutosh
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Special-Appointment Assistant Professor
Position
Special-Appointment Assistant Professor
External link

Degree

  • Ph.D. (Science) ( 2020.5   National Physical Laboratory, INDIA )

Research Interests

  • Magnetism

  • Quantum Sensing

  • Malaria

  • Biosensing

  • Bio-Imaging

  • Spin defects

Research Areas

  • Natural Science / Magnetism, superconductivity and strongly correlated systems  / Quantum Magnetism

  • Natural Science / Biophysics, chemical physics and soft matter physics  / Biomagnetism

  • Life Science / Biomedical engineering  / Malaria Diagnostics

  • Nanotechnology/Materials / Nanobioscience  / Quantum Bio-sensing

Education

  • National Physical Laboratory, INDIA     Ph.D. (Science)

    2015 - 2020

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    Country: India

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  • Indian Institute of Technology Delhi, INDIA     Master of Science (Physics)

    2012 - 2014

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    Country: India

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Research History

  • Okayama University

    2024.7

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    Country:Japan

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  • Indian Institute of Technology Madras, INDIA

    2021.9 - 2024.3

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    Country:India

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  • Fritz Haber Institute - Max-Planck-Gesellschaft, GERMANY

    2021.1 - 2021.6

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    Country:Germany

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Papers

  • Single and double quantum transitions in spin-mixed states under photo-excitation Reviewed

    Anand Patel, Z. Chowdhry, Anil Prabhakar, Ashutosh Rathi, Vidya Praveen Bhallamudi

    Scientific Reports   14 ( 1 )   22421   2024.9

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

    DOI: 10.1038/s41598-024-73118-z

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    Other Link: https://www.nature.com/articles/s41598-024-73118-z

  • Interplay of spin and orbital ordering in a frustrated spinel chromite Reviewed

    Ashutosh Rathi, P. D. Babu, Pooja Sahlot, A. M. Awasthi, Shivani Chaudhary, S. Patnaik, Pardeep, P. K. Rout, Bheema Lingam Chittari, G. A. Basheed

    Journal of Physics Condensed Matter   36 ( 13 )   135801   2023.12

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

    Geometric Spin Frustration, when sufficiently strong, provides a platform for novel spin textures with emergent phenomena, such as ferroelectricity. This article investigates NiCr2O4, a spinel chromite co-hosting the frustration of Cr3+ spins with orbital frustration of Ni2+ ions, with the latter expected to eradicate the spin frustration by lowering lattice symmetry. Detailed experiments unveil an intriguing reentrant-spin-glass-like behavior alongside the previously known canted ferrimagnetism. Our analysis focuses on the ordering of Cr3+ spins at two distinct sublattices, with one contributing to canted ferrimagnetism, while the other exhibits a local ↑↑↓↓ (spin-frustrated) texture, potentially inducing spin-glass behavior. Density functional theory calculations corroborate the experimental findings, establishing ↑↑↓↓ as the ground state of NiCr2O4. This study presents new prospects for ferroelectricity driven by exchange striction in orbitally ordered spinel chromites.

    DOI: 10.1088/1361-648X/ad135f

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  • Hemozoin in malaria eradication—from material science, technology to field test Reviewed

    Ashutosh Rathi, Z. Chowdhry, Anand Patel, Siming Zuo, Thulya Chakkumpulakkal Puthan Veettil, John A. Adegoke, Hadi Heidari, Bayden R. Wood, Vidya Praveen Bhallamudi, Weng Kung Peng

    NPG Asia Materials   15 ( 1 )   70   2023.12

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    Authorship:Lead author, Corresponding author  

    Malaria continues to be among the most lethal infectious diseases. Immediate barriers include the detection of low-parasitemia levels in asymptomatic individuals, which act as a reservoir for future infections, and the emergence of multidrug-resistant strains in malaria-endemic, under-resourced regions. The development of technologies for field-deployable devices for early detection and targeted drugs/vaccines is an ongoing challenge. In this respect, the identification of hemozoin during the Plasmodium growth cycle presents a unique opportunity as a biomarker for malaria infection. The last decade has witnessed the development of numerous opto-/magnetic- based ultrasensitive hemozoin sensing technologies with tremendous potential of rapid and accurate malaria diagnosis and drug testing. The unique information in hemozoin formation can also shed light on the development of targeted drugs. Here, we present a comprehensive perspective on state-of-the-art hemozoin-based methodologies for detecting and studying malaria. We discuss the challenges (and opportunities) to expedite the translation of the technology as a point-of-site tool to assist in the global eradication of malaria infection.

    DOI: 10.1038/s41427-023-00516-6

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  • Understanding interfacial conductance in non-stoichimetric CaxTayO3−δ/SrTiO3 Reviewed

    Sumit Kumar, Simran Nehra, Shikha Shrivastava, Ashutosh Rathi, K. K. Maurya, Sunil Ojha, Sonu Chhillar, C. S. Yadav, Vipin Chawla, Anjana Dogra

    Journal of Physics D: Applied Physics   57 ( 5 )   055303   2023.11

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    Publishing type:Research paper (scientific journal)  

    In search of novel conducting oxide heterointerfaces, we previously uncovered an distinctive quasi two-dimensional electron gas (q-2DEG) type behaviour in non-stoichimetric CaxTayO3-δ/SrTiO3 heterostructure. However, the underlying mechanism remained enigmatic. In this study, we delve into the intricate interplay of growth conditions, stoichiometry, and transport properties of these heterostructures. Using (Ca0.5TaO3)2 Target and the pulsed laser deposition technique, we grow the epitaxial thin films while systematically varying growth parameters, inculding laser energy density, oxygen pressures, and post-deposition annealing. Structural analysis unveiled a notable presence of oxygen vacancies in the as-grown films, while annealed samples exhibited an oxygen surplus. Building upon these findings, our comprehensive charge transport measurements revealed that while oxygen vacancies do contribute to conductivity, the polar catastrophe model takes precedence as the primary source of interfacial conductance in these heterostructures. This study provides valueable insights into the behavior of these innovative heterostructures, paving the way for future advancements in the field.

    DOI: 10.1088/1361-6463/acfcc5

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  • Formation and magnetic properties of spark plasma sintered Mn3−δGa (δ = 0, 1) Heusler alloys: Experiment and theory Reviewed

    Sonam Perween, Ashutosh Rathi, Parul Rani Raghuvanshi, Amrita Bhattacharya, P. V, PrakashMadduri, P. K. Rou, B. Sivaiah, Ajay Dhar, R. P. Pan, B. Gahtori, G. A. Basheed

    Journal of Physics and Chemistry of Solids   154   110050   2021.7

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    In this study, we synthesized D022 Mn3−δGa (δ = 0, 1) alloys using the spark plasma sintering method. The m(T) results confirmed the formation of the D022 phase with Tc ≃ 780 K (710 K) for Mn3Ga (Mn2Ga). The alloys exhibited hard magnetic behavior with large room temperature spontaneous magnetization of ms(80 kOe) = 1.63 (0.83) μB/f.u. and coercivity of Hc = 4.28 (3.35) kOe for Mn3Ga (Mn2Ga). The magnetic properties were investigated further up to Tc and Hc (T) analysis using the Stoner–Wohlfarth model demonstrated the nucleation mechanism for the magnetization reversal. Calculations of the electronic density of states confirmed the magnetic contribution from two symmetrically inequivalent Mn sites in a Heusler-like tetragonal phase. Density functional theory calculations also showed that the ground state of D022 Mn2Ga was achieved by the removal of Mn atoms from the full Heusler Mn3Ga structure in accordance with the half-Heusler alloy structure, which supported the experimental observations.

    DOI: 10.1016/j.jpcs.2021.110050

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Presentations

  • Efficient and rapid detection of malaria parasites using magnetic dichroism

    M. Sahoo, Ashutosh Rathi, G. Sumana, N. Christopher, B. Ghatori, R. P. Pant, G. A. Basheed

    64th DAE Solid State Physics Symposium (DAE-SSPS 2019)  2019.12.21 

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    Event date: 2019.12.18 - 2019.12.22

    Language:English  

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  • Interplay between spin and charge dynamics in complex (3d → 5d) magnetic oxides

    Ashutosh Rathi, R. P. Pant and G. A. Basheed

    The 2nd Asia Pacific Workshop on Quantum Magnetism 2018  2018.11.30 

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    Event date: 2018.11.29 - 2018.12.7

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  • Tailoring the spin and charge dynamics in (3d → 5d) magnetic structures

    Ashutosh Rathi, R. P. Pant, G. A. Basheed

    The European School on Magnetism 2018: Magnetism By Light  2018.9.24 

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    Event date: 2018.9.17 - 2018.9.28

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  • Combating malaria: Hemozoin nanocrystals under opto-magnetic lens

    Ashutosh Rathi, P. G. Hegde, Anand Patel, Arumugam Rajavelu, V. P. Bhallamudi

    Nature Conference on "Nanomaterials in biomedical applications"  2024.2.26 

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    Language:English  

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  • Temperature dependent study of charge-state dynamics of nitrogen-vacancy center in diamond

    Sagar Chowdhury, Anand Patel, Ashutosh Rathi, Vidya Praveen Bhallamudi

    APS March Meeting 2023  2023.3.22 

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Awards

  • Start-up Grant in Medical Diagnostic Innovations

    2023.7   NIRMAAN, IIT Madras, INDIA  

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  • International Travel Grant

    2018   SERB, Department of Science and Technology, INDIA  

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  • Doctoral Research Fellowship

    2015   University Grants Commission, INDIA  

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  • Merit-cum-Means scholarship

    2012   Indian Institute of Technology Delhi, INDIA  

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