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KAKEN_26600078seika.pdf
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Download
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:266.7 KB
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| Last updated |
:Jan 6, 2017 |
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Total downloads since Jan 6, 2017 : 561
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| Title |
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電界誘起マグノン干渉効果
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| Kana |
デンカイ ユウキ マグノン カンショウ コウカ
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Denkai yuki magunon kansho koka
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Electric field induced magnon interference
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安藤, 和也
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アンドウ, カズヤ
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Ando, Kazuya
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慶應義塾大学・理工学部・准教授
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Research team head
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科研費研究者番号 : 30579610
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2016
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科学研究費補助金研究成果報告書
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2015
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磁性絶縁体中の角運動量輸送はマグノンによって担われる。マグノンの持つ角運動量は金属/磁性絶縁体界面におけるスピン交換により伝導電子スピン流へと受け渡すことができ, このようなマグノン-伝導電子スピン流変換は絶縁体ベースのスピントロニクスの基盤となる。本研究では, 磁性絶縁体から金属へと流れ出す伝導電子スピン流の精密測定により, 伝導電子スピン流と結合しないマグノンモードを発見した。さらにマグノン分裂によるスピン流増大現象とスピン系緩和時間の測定により, マグノン相互作用もスピン変換効率の小さなマグノンモードを生成することが明らかになった。
Magnons are responsible for the angular momentum transport in magnetic insulators. The angular momentum of magnons can be transferred to conduction electrons at metal/magnetic insulator interfaces, which is the foundation of insulator-based spintronics. In this study, we revealed disappearance of the angular momentum conversion between magnons and conduction electron spins by measuring spin-current emission from a magnetic insulator. We also found that magnon splitting also creates the magnon mode that is disconnected to the conduction electron spin currents at metal/magnetic insulator interfaces.
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研究種目 : 挑戦的萌芽研究
研究期間 : 2014～2015
課題番号 : 26600078
研究分野 : 総合理工
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