Nonequilibrium Rashba field driven domain wall motion in ferromagnetic nanowires
Nonequilibrium Rashba field driven domain wall motion in ferromagnetic nanowires
复制标题
铁磁纳米线中非平衡 Rashba 场驱动磁畴壁运动
DOI：
10.1103/physrevb.87.184415
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发表时间：
2013
影响因子：
3.7
通讯作者：
M. Thorwart
中科院分区：
文献类型：
--
作者：
M. Stier;R. Egger;M. Thorwart
研究了自旋轨道相互作用（SOI）对超薄铁磁纳米线中磁（Bloch）畴壁电流感应运动的影响。结果表明，自旋弛豫和SOI的协同作用产生了一种新的强非平衡Rashba场，即使在中等SOI中也占主导地位。该场引起复杂的自旋进动，并随着SOI的增加从平动到振荡壁动力学转变。研究表明，不同长度的电流脉冲可以有效地控制畴壁运动。
We study the effects of spin-orbit interaction (SOI) on the current-induced motion of a magnetic (Bloch) domain wall in ultrathin ferromagnetic nanowires. The conspiracy of spin relaxation and SOI is shown to generate a novel strong nonequilibrium Rashba field, which is dominant even for moderate SOI. This field causes intricate spin precession and a transition from translatory to oscillatory wall dynamics with increasing SOI. We show that current pulses of different lengths can efficiently be used to control the domain wall motion.