Spin torques due to diffusive spin current in magnetic texture
Spin torques due to diffusive spin current in magnetic texture
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DOI：
10.1103/physrevb.87.094404
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发表时间：
2012-12
影响因子：
3.7
通讯作者：
K. Hosono;J. Shibata;H. Kohno;Y. Nozaki
中科院分区：
文献类型：
--
作者：
K. Hosono;J. Shibata;H. Kohno;Y. Nozaki
我们提出了一个微观理论的自旋力矩由于自旋积累诱导的扩散自旋电流。所得到的表达式是由于与普通电流有关的“局部”自旋电流而产生的现有表达式的自然推广，并且是最近研究的诱导电荷积累的自旋动力的倒数[J.柴田和H. Kohno，B 84，184408（2011）]。将结果应用于非局域自旋注入系统中的畴壁运动，并计算了扩散自旋流引起的转矩和力。
We present a microscopic theory of spin torque due to diffusive spin currents induced by spin accumulation. The obtained expression is a natural extension of the existing one due to ``local'' spin currents associated with ordinary electric currents, and is the reciprocal of the spin motive force which induces charge accumulation as studied recently [J. Shibata and H. Kohno, Phys. Rev. B 84, 184408 (2011)]. The result is applied to a domain wall motion in a nonlocal spin injection system, and the torque and force due to diffusive spin current are evaluated.