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

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

〇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.