2020 Fiscal Year Final Research Report
Magnetic spin Hall effect in Weyl antiferromagnet
| Project/Area Number |
19K23423
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Mizuno Hayato 東京大学, 物性研究所, 特任研究員 (30846499)
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| Project Period (FY) |
2019-08-30 – 2021-03-31
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| Keywords | スピンホール効果 / 反強磁性金属 |
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| Outline of Final Research Achievements |
In recent years, antiferromagnetic Weyl semimetal and the magnetotransport properties have attracted much attention due to the unique electronic structure. In this study, we measure the spin accumulation on the surface of Mn3Sn and investigate the relationship between magnetic order and spin Hall effect of it. We prepare a Mn3Sn polycrystalline thin film. The film was patterned into a T-shaped structure with a ferromagnetic metal wire. This simple structure allowed us to detect the spin accumulation signal of Mn3Sn. It was also found that the spin Hall signal can be detected even below the transition temperature where the magnetic order of Mn3Sn disappears.
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| Free Research Field |
薄膜磁性
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| Academic Significance and Societal Importance of the Research Achievements |
電子のもつ電荷とスピンの二つの自由度を利用するスピントロニクス分野において、角運動量の流れであるスピン流の制御は重要課題の一つである。本研究により、反強磁性体のスピンホール効果を簡便に測定可能な手法を確立したことは、今後の反強磁性体やワイル金属を用いた電流-スピン流変換の研究を発展させるものである。また、本研究にて用いたT字型の素子構造は、不揮発性のスピンロジックデバイスへの応用が提案されており、機能性反強磁性材料を用いた性能の向上が期待される。
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