Time-Domain Measurement of Current-Induced Spin Wave Dynamics
Time-Domain Measurement of Current-Induced Spin Wave Dynamics
复制标题
DOI：
10.1103/physrevlett.108.017203
复制
发表时间：
2012-01-05
影响因子：
8.6
通讯作者：
Ono, Teruo
中科院分区：
文献类型：
--
作者：
Sekiguchi, Koji;Yamada, Keisuke;Ono, Teruo
自旋电子器件的性能主要取决于三个材料参数，即电流中的自旋极化（P）、本征吉尔伯特阻尼（α）和非绝热自旋转移矩系数（β）。然而，一直没有方法来确定这些关键的材料参数在一个独立的方式。在这里，我们表明，P，α和β可以同时确定通过执行一个单一的系列时域测量的电流诱导的自旋波动力学在铁磁薄膜。
The performance of spintronic devices critically depends on three material parameters, namely, the spin polarization in the current (P), the intrinsic Gilbert damping (alpha), and the coefficient of the nonadiabatic spin transfer torque (beta). However, there has been no method to determine these crucial material parameters in a self-contained manner. Here we show that P, alpha, and beta can be simultaneously determined by performing a single series of time-domain measurements of current-induced spin wave dynamics in a ferromagnetic film.