2022年第83回応用物理学会秋季学術講演会

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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)

15:30 〜 15:45

[22p-A205-8] Spin-orbit torque induced magnetization switching using Co2MnAl spin source

Daimu Morita1、Takuya Hara1、Michihiko Yamanouchi1、Tetsuya Uemura1 (1.IST, Hokudai Univ.)

キーワード:spin-orbit torque, magnetic Weyl semimetal, Co2MnAl

Spin-orbit torques (SOTs) generated from ferromagnetic materials have attracted much attention because of the capability of field-free magnetization switching for perpendicularly magnetized thin films. In this study, we demonstrated a field-free magnetization switching for a perpendicularly magnetized CoFeB using in-plane magnetized Cobalt-based Heusler alloy Co2MnAl (CMA) as a spin source which is theoretically predicted to be a magnetic Weyl semimetal. Moreover, the polarity of switching was reversed depending on the direction of the magnetization of CMA, suggesting that the possible origin of the SOTs is spin-orbit precession.