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arXiv 1606.07540cond-mat.mes-hallcond-mat.mtrl-sci
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自旋霍尔几何中垂直铁磁体的电流感生不稳定性

Current-Induced Instability of a Perpendicular Ferromagnet in Spin Hall Geometry

Tomohiro Taniguchi, Seiji Mitani, Masamitsu Hayashi

摘要:

我们发展了两个铁磁体存在时自旋霍尔力矩的理论公式。虽然传统的自旋霍尔转矩的方向总是指向面内方向,但是本系统能够通过改变另一磁化的方向来操纵作用于一个磁化的转矩方向。基于自旋积累的扩散方程和朗道公式,导出了自旋霍尔力矩的解析表达式。本模型提供了一种利用自旋霍尔效应在零场确定性地切换垂直铁磁体的解决方案。

英文摘要:

We develop a theoretical formula of spin Hall torque in the presence of two ferromagnets. While the direction of the conventional spin Hall torque always points to the in-plane direction, the present system enables to manipulate the torque direction acting on one magnetization by changing the direction of another magnetization. Based on the diffusion equation of the spin accumulation and the Landauer formula, we derive analytical formula of the spin Hall torque. The present model provides a solution to switch a perpendicular ferromagnet deterministically at zero field using the spin Hall effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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