2019 Fiscal Year Final Research Report
Observation of current-driven domain wall motions in ferromagnetic naowaires
| Project/Area Number |
17H04795
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nanostructural physics
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| Research Institution | Gifu University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | 磁性ワイヤー / 磁壁 / 磁化反転 / 磁区 |
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| Outline of Final Research Achievements |
We investigated the magnetic properties and electrical conduction properties in cylindrical metal-ferromagnetic nanowires. In the research, the following results were obtained. (1) Elucidation of changes in magnetic properties depending on aspect ratio of ferromagnetic nanowires, (2) Elucidation of magnetization reversal behavior in ferromagnetic/nonmagnetic/ferromagnetic nanowires with three-layer structure, (3) Observation of the magnetoresistance effect in single magnetic nanowire and elucidation of its magnetic domain formation.
As other research, we investigated that (4) Elucidation of the correlation between microstructure and magnetic properties in ferromagnetic films composed with oxide magnetic nanoparticles, (5) Analysis of magnetization structures and elucidation of spin dynamics by using micromagnetic simulations. These results could clarify the magnetic properties and spin dynamics in antiferromagnet nanowires and magnetized synthetic antiferromagnetic coupling structure.
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| Free Research Field |
磁気物性、スピントロニクス
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果の学術的意義は、円柱形の磁性ワイヤーにおける結晶構造と磁気特性の相関を明らかにし、また数値計算を用いることで、磁性ワイヤーにおける磁化反転挙動における磁区生成や磁壁移動について明らかにすることができたことである。社会的意義としては、磁性ワイヤーを用いた次世代磁気メモリや磁気センサの応用開発への基盤となる研究を実施できた点である。
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