| 研究課題/領域番号 |
22KJ2060
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| 補助金の研究課題番号 |
21J20477 (2021-2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2021-2022) |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分13020:半導体、光物性および原子物理関連
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| 研究機関 | 大阪大学 |
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研究代表者 |
渡邉 杜 大阪大学, 理学研究科, 特別研究員(DC1)
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| 研究期間 (年度) |
2023-03-08 – 2024-03-31
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| 研究課題ステータス |
完了 (2023年度)
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| 配分額 *注記 |
3,100千円 (直接経費: 3,100千円)
2023年度: 1,000千円 (直接経費: 1,000千円)
2022年度: 1,000千円 (直接経費: 1,000千円)
2021年度: 1,100千円 (直接経費: 1,100千円)
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| キーワード | antiferromagnet / electrical transport / Antiferromagnet / Frustrated Magnetism / vdW Magnetic Materials / van-der-Waals |
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| 研究開始時の研究の概要 |
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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| 研究実績の概要 |
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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