2019年第80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(ポスター講演)

10 スピントロニクス・マグネティクス » 10 スピントロニクス・マグネティクス(ポスター)

[18p-PB1-1~84] 10 スピントロニクス・マグネティクス(ポスター)

2019年9月18日(水) 13:30 〜 15:30 PB1 (第二体育館)

13:30 〜 15:30

[18p-PB1-26] Spin-torque ferromagnetic resonance in CoFe / Ti / FeNi trilayers

Yuya Koike1,2、Satoshi Iihama2,3、Shigemi Mizukami2,3,4 (1.Tohoku Univ.、2.WPI-AIMR, Tohoku Univ.、3.CSRN, Tohoku Univ.、4.CSIS, Tohoku Univ.)

キーワード:spintronics, spin-orbit torque

Magnetization switching using spin-orbit torque (SOT) has attracted much attention for high-speed spintronic devices. Conventionally, an in-plane external or effective magnetic field is applied for SOT switching of the out-of-plane magnetization. However, a field-free switching is more desirable and physically possible when an injected spin current has a spin direction perpendicular to a film plane. One of the promising ways is to use ferromagnet (FM) as a spin current source. In addition, it was recently reported that FM/nonmagnet (NM) interface generates such spin current. However, the SOT for such FM/NM/FM trilayer has not been intensively studied. Here, we performed spin-torque ferromagnetic resonance (ST-FMR) measurements in CoFe/Ti/NiFe trilayer to gain insights into the spin current inherent in trilayer system.