Portal de Periódicos da CAPES

Time-Domain Measurement of Current-Induced Spin Wave Dynamics

2012; American Physical Society; Volume: 108; Issue: 1 Linguagem: Inglês

10.1103/physrevlett.108.017203

1092-0145

Koji Sekiguchi, K. Yamada, Soo-Man Seo, Kyung‐Jin Lee, Daichi Chiba, Kensuke Kobayashi, Teruo Ono,

Advanced Memory and Neural Computing

The performance of spintronic devices critically depends on three material parameters, namely, the spin polarization in the current ($P$), the intrinsic Gilbert damping ($\ensuremath{\alpha}$), and the coefficient of the nonadiabatic spin transfer torque ($\ensuremath{\beta}$). However, there has been no method to determine these crucial material parameters in a self-contained manner. Here we show that $P$, $\ensuremath{\alpha}$, and $\ensuremath{\beta}$ can be simultaneously determined by performing a single series of time-domain measurements of current-induced spin wave dynamics in a ferromagnetic film.