2022年第83回応用物理学会秋季学術講演会

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一般セッション(口頭講演)

10 スピントロニクス・マグネティクス » 10.2 スピン基盤技術・萌芽的デバイス技術

[22p-A205-1~18] 10.2 スピン基盤技術・萌芽的デバイス技術

2022年9月22日(木) 13:30 〜 18:30 A205 (A205)

金井 駿(東北大)、笠原 健司(福岡大)、伊藤 啓太(東北大)

17:30 〜 17:45

[22p-A205-15] Time resolved state tomography for time evolution of parametric oscillation of magnetization

Hiroki Shimizu1、Tomosato Hioki2,1、Eiji Saitoh1,2 (1.Dept. Appl. Phys. Univ. Tokyo、2.AIMR Tohoku Univ.)

キーワード:magnetization dynamics, parametric excitation

In this study, we extended the state tomography method for magnetization using AC spin current measurements to a time-resolved measurement system with high-speed signal processing techniques. We report the observation of the time-resolved magnetization dynamics in a magnetic parametron consisting of thin disk of yttrium iron garnet (YIG). We also report the observation of a magnon thermal squeezed state in which the thermal distribution of the magnetization is squeezed in one direction due to nonlinear effects of the parametric excitation.