[17a-M_374-1~12] 10.3 スピンデバイス・磁気メモリ・ストレージ技術

9:00 〜 9:15英語発表

[17a-M_374-1] Spin-Pumping-Induced Spin Accumulation and Non-local Spin Detection in Microfabricated Pt/CoFe/n-GaAs Structures

Varun Kumar Kushwaha¹, Mineto Ogawa², Tetsuya Uemura², 〇Takeshi Seki^1,3 (1.IMR, Tohoku Univ., 2.Grad. Sch. Info. Sci. Tech., Hokkaido Univ., 3.CSIS, Tohoku Univ.)

キーワード：

Spin pumping、Spin orbit torque、Spin accumulation

We report the dynamical spin injection and the nonlocal detection in a microfabricated Pt/CoFe/n-GaAs heterostructure using spin pumping driven by spin-orbit torque (SOT)-ferromagnetic resonance (FMR). The application of radio frequency current to the Pt/CoFe bilayer electrode induced magnetization precession in CoFe through the SOT, resulting in the spin accumulation in the GaAs channel. The spin accumulation in the GaAs was detected electrically using a CoFe electrode with non-local geometry at 77 K. The symmetric Lorentzian voltage component retains the same sign for opposite magnetic field polarities, confirming spin-pumping-induced spin accumulation.