2022年第83回応用物理学会秋季学術講演会

講演情報

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)

13:45 〜 14:00

[22p-A205-2] Acoustic spin Hall effect in heavy metal/ferrimagnetic metal bilayers

Takuya Kawada1、Hiroki Matsumoto1、Masashi Kawaguchi1、Kay Yakushiji2、Hiroshi Kohno3、Masamitsu Hayashi1 (1.The Univ. of Tokyo、2.AIST、3.Nagoya Univ.)

キーワード:surface acoustic wave, spin current, ferrimagnetism

Recently, we have reported that SAW induces a field-dependent DC voltage in heavy metal/ferromagnetic metal bilayers, which originates from the combination of AC spin current generation via spin-orbit interaction and magnetoelastic magnetization oscillation by SAW. In general, larger voltage is obtained by smaller saturation magnetization. Therefore, use of rare earth-transition metal ferrimagnetic alloy as a magnetic layer is expected to significantly enhance the field-dependent acoustic voltage since its magnetization can be set to near zero by tuning the composition. In the presentation, we will discuss the Gd composition dependence of the acoustic voltage in W/GdxCo1-x.