| Project/Area Number |
22KJ2060
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| Project/Area Number (Other) |
21J20477 (2021-2022)
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund (2023)
Single-year Grants (2021-2022) |
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| Section | 国内 |
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| Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
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| Research Institution | Osaka University |
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Principal Investigator |
渡邉 杜 大阪大学, 理学研究科, 特別研究員(DC1)
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2023: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2022: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2021: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | antiferromagnet / electrical transport / Antiferromagnet / Frustrated Magnetism / vdW Magnetic Materials / van-der-Waals |
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| Outline of Research at the Start |
In this research, the applicant aims to establish a foundation of spin dynamics in atomically layered two-dimensional (2D) antiferromagnets (AFMs), where the enhanced fluctuations of spins play a large role in its magnetic properties. Electrical current measurements will be utilized to observe the magnetic characteristics, and spin current measurements will be utilized as a probe of spin fluctuations in the 2D AFMs.
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| Outline of Annual Research Achievements |
In this fiscal year, the applicant has submitted the findings of the anomalous Hall effect of Ag2CrO2 to an academic journal. Through discussion with collaborators and theorists, the applicant has found a giant anomalous Hall effect present in the electrical transport properties of Ag2CrO2, where the effect is attributed to the fluctuations of the magnetic moments. Since Ag2CrO2 is highly magnetic, this effect was found to possess a notable anomalous Hall ratio. Although further elucidation of the magnetic structure within Ag2CrO2 is required, there is a possibility that the unconventional anomalous Hall effect may originate from some non-coplanar magnetic structure found in Ag2CrO2 together with the enhancment of the anomalous Hall effect from the thermal fluctuations of the spins. The applicant has also performed the measurements of spin transport in nanoscale Kagome ferromagnets with internal colleagues and external collaborators. Although the results are still preliminary and cannot be discussed in detail at the moment, continued work of spin transport in such a system may reveal further insight into the relationship between the anomalous Hall effect, spin Hall effect and Berry curvature.
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