2020年第67回応用物理学会春季学術講演会

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

[14a-A501-1~13] 10.2 スピン基盤技術・萌芽的デバイス技術

2020年3月14日(土) 09:00 〜 12:30 A501 (6-501)

好田 誠(東北大)、谷口 知大(産総研)

11:15 〜 11:30

[14a-A501-9] Efficient spin current injection in Co2MnSi/Pt films

〇(P)Yuta Sasaki1、Satoshi Sugimoto1、Yukiko Takahashi1、Shinya Kasai1,2 (1.NIMS、2.JST PRESTO)

キーワード:Spin current, Heusler alloys

Spin pumping is one of the promising ways to generate the spin current in ferromagnetic (FM)/nonmagnetic (NM) heterostructures. A magnetization precessional motion under the ferromagnetic resonance (FMR) condition induces the spin current flow to the NM layer and it is converted into a transverse charge current via the inverse spin Hall effect(ISHE) in the NM layer. The key factor determining the spin transport property is the spin mixing conductance at the FM/NM surface. The spin injection efficiency depends on the choice of the materials, however, there are few reports on its FM material dependence. In this study, the spin injection efficiency in Co2MnSi(CMS), which shows a large spin polarization and large magnetoresistance, was systematically investigated using the spin pumping method.