[18p-PB1-1~84] 10 Spintronics and Magnetics (Poster)

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

〇Yuya Koike^1,2, Satoshi Iihama^2,3, Shigemi Mizukami^2,3,4 (1.Tohoku Univ., 2.WPI-AIMR, Tohoku Univ., 3.CSRN, Tohoku Univ., 4.CSIS, Tohoku Univ.)

Keywords: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.