2023 Fiscal Year Final Research Report
Three-dimensional observation of magnetic domain structures to elucidate the magnetic functionality using X-ray magnetic tomography
| Project/Area Number |
20H00349
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Medium-sized Section 29:Applied condensed matter physics and related fields
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| Research Institution | Kwansei Gakuin University (2021-2023)
Japan Synchrotron Radiation Research Institute (2020) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
関 真一郎 東京大学, 大学院工学系研究科(工学部), 准教授 (70598599)
小野 輝男 京都大学, 化学研究所, 教授 (90296749)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 3次元磁区観察 / スキルミオン / 焼結永久磁石 / X線イメージング |
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| Outline of Final Research Achievements |
We developed the X-ray magnetic tomography technique at the synchrotron radiation facility SPring-8. This new experimental technique allowed non-destructive three-dimensional observation of the microscopic magnetic domain structure (distribution of N and S poles) inside bulk magnetic materials, clarifying the relationship between the magnetic domain structure and properties of the magnetic materials. Using X-ray magnetic tomography, we successfully visualized the theoretically predicted skyrmion strings and proved the presence of singularity points. The behavior of nucleation and magnetic domain propagation during the magnetization reversal process of neodymium-sintered magnets were directly observed, and the correlation with the microstructure was discussed.
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| Free Research Field |
放射光による新規手法開発と磁性研究
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| Academic Significance and Societal Importance of the Research Achievements |
将来の高密度情報記録・演算素子として有望視されているトポロジカル磁気構造や、モーター材料として重要な焼結永久磁石について、材料内部の磁区の挙動をナノメートルの分解能で可視化できる実験手法を開発した。本研究の成果は、新たな原理に基づく低消費電力の磁気メモリデバイスや、高効率・低燃費のモーターに搭載される高性能永久磁石材料の開発に資するものである
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