Manipulating current induced motion of magnetic skyrmions in the magnetic nanotrack
Manipulating current induced motion of magnetic skyrmions in the magnetic nanotrack
复制标题
操纵磁性纳米轨道中磁性斯格明子的电流感应运动
DOI：
10.1088/0022-3727/48/11/115004
复制
发表时间：
2015-03-25
影响因子：
3.4
通讯作者：
Zhu, Tao
中科院分区：
文献类型：
--
作者：
Ding, Jinjun;Yang, Xiaofei;Zhu, Tao
在本文中，我们研究了电流感生的垂直磁各向异性（PMA）的磁性纳米轨道中的磁skyrmions运动的微磁学模拟。结果表明，Skyrmion的尺寸不仅可以通过内禀参数如Dzyaloshinskiiii-Moriya相互作用强度和PMA常数来调节，而且还可以通过外磁场来调节.此外，skyrmion速度线性依赖于skyrmion的大小。在纳米轨道中存在缺陷的情况下，链中skyrmion的运动不仅取决于电流诱导的驱动力矩，而且还取决于skyrmion-skyrmion排斥相互作用。由于额外的Skyrmion-Skyrmion排斥相互作用，脱钉临界电流密度可以进一步降低。我们的工作为基于磁skyrmions的自旋电子学器件的未来发展提供了指导。
In this paper we investigate the current induced motion of magnetic skyrmions in a magnetic nanotrack with perpendicular magnetic anisotropy (PMA) using micromagnetic simulation. It is found that the size of the skyrmion can be tuned not only by the intrinsic parameters, such as Dzyaloshinskii–Moriya interaction strength and PMA constant, but also by the external magnetic field. Furthermore, the skyrmion velocity linearly depends on the size of the skyrmion. In the presence of the defects in the nanotrack, the motion of skyrmions in the chain depends not only on the current induced driving torque, but also on the repulsive skyrmion–skyrmion interaction. The critical current density of depinning can be further reduced due to the additional repulsive skyrmion–skyrmion interaction. Our work gives guidance for the future development of spintronics devices based on magnetic skyrmions.