Dynamics of noncollinear antiferromagnetic textures driven by spin current injection
Dynamics of noncollinear antiferromagnetic textures driven by spin current injection
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DOI：
10.1103/physrevb.100.054415
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发表时间：
2019-01
影响因子：
3.7
通讯作者：
Y. Yamane;O. Gomonay;J. Sinova
中科院分区：
文献类型：
--
作者：
Y. Yamane;O. Gomonay;J. Sinova
我们提出了一种理论形式来解决自旋电流注入的纹理非共线反铁磁体的动力学问题。我们推导了反铁磁体的正弦戈登型运动方程，该方程适用于技术上重要的反铁磁体，例如 ${\mathrm{Mn}}_{3}\mathrm{Ir}$ 和 ${\mathrm{Mn}}_{3}\mathrm{Sn}$，并为这些材料中的磁畴壁动力学提供了一种分析方法。我们得到了磁畴壁速度的表达式，通过利用电流密度的自旋霍尔效应，预计在 ${\mathrm{Mn}}_{3}\mathrm{Ir}$ 中达到 $\ensuremath{\sim}1$ km/s $\ensuremath{\sim}{10}^{11}\phantom{\rule{4pt}{0ex}}\mathrm{A}/{\mathrm{m}}^{2}$。
We present a theoretical formalism to address the dynamics of textured, noncollinear antiferromagnets subject to spin current injection. We derive sine-Gordon type equations of motion for the antiferromagnets, which are applicable to technologically important antiferromagnets such as ${\mathrm{Mn}}_{3}\mathrm{Ir}$ and ${\mathrm{Mn}}_{3}\mathrm{Sn}$, and enables an analytical approach to domain wall dynamics in those materials. We obtain the expression for domain wall velocity, which is estimated to reach $\ensuremath{\sim}1$ km/s in ${\mathrm{Mn}}_{3}\mathrm{Ir}$ by exploiting spin Hall effect with electric current density $\ensuremath{\sim}{10}^{11}\phantom{\rule{4pt}{0ex}}\mathrm{A}/{\mathrm{m}}^{2}$.