2021 Fiscal Year Final Research Report
Establishment of evaluation method for Neel spin orbit torque in C11b Cr2Al via magnetic transfer
Project/Area Number |
20K15109
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 28010:Nanometer-scale chemistry-related
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Research Institution | Osaka University |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2022-03-31
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Keywords | 反強磁性 / スピントロニクス / 磁性薄膜 / 磁気抵抗効果 |
Outline of Final Research Achievements |
Staggered magnetization in antiferromagnetic materials has a possibility of the application to the next generation memory device with a THz operating frequency. In this perspective, the preparation condition and magnetic properties of C11b Cr2Al in thin film system were evaluated. As results, it was clarified that the formation temperature of C11b Cr2Al in thin film system was above 873 K. Added to that, the composition range with around 27-33at.%-Al provided the single phase C11b Cr-Al. The order parameter of C11b crystal was changed by the composition but did not affect to its Neel temperature much. Through the magnetoresistance measurement, the magnetic anisotropy of C11b Cr-Al was evaluated. As a result, it was indicated that the magnetic moment in C11b Cr-Al thin system possibly lie in the c-plane.
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Free Research Field |
磁性薄膜
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Academic Significance and Societal Importance of the Research Achievements |
C11b Cr2Alの薄膜系における報告例は極めて少なく,これに関して詳細に検討した本研究の結果は十分に確立された反強磁性材料のライブラリに新たなメンバーを加えた点で学術的・社会的意義があると言える.特に,学術的側面で言えば,規則合金薄膜の系としても比較的大きな単位胞となるC11b構造の薄膜作製例として,その成長条件を明らかにしたことは大きいと考える.社会的には,応用の期待される反強磁性ベース次世代メモリの開発に向け材料の選択肢を増やした点で意義があると言える.
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