Domain wall dynamics driven by a circularly polarized magnetic field in ferrimagnet: effect of Dzyaloshinskii–Moriya interaction
Domain wall dynamics driven by a circularly polarized magnetic field in ferrimagnet: effect of Dzyaloshinskii–Moriya interaction
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DOI：
10.1007/s12598-022-02056-4
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发表时间：
2022-08
期刊：
影响因子：
8.8
通讯作者：
Ting-ting Liu;Y. Hu;Yang Liu;Z. Jin;Zheng-Hua Tang;M. Qin
中科院分区：
文献类型：
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作者：
Ting-ting Liu;Y. Hu;Yang Liu;Z. Jin;Zheng-Hua Tang;M. Qin
本文利用集体坐标理论和原子微磁模拟研究了圆极化磁场驱动下铁磁体的畴壁运动，并特别关注了Dzyaloshinskii-Moriya相互作用（DMI）的影响。与反铁磁畴壁的情况类似，铁磁畴壁的运动速度与DMI的大小呈线性关系。此外，DMI对畴壁动力学的调节作用类似于净自旋密度，这提示了铁磁体中另一个控制畴壁的内部参数。此外，结果表明，铁磁体中的畴壁动力学比铁磁体中的畴壁动力学要快得多，这再次证实了铁磁体在未来自旋电子应用中的巨大潜力。图形抽象
In this work, we study the domain wall motion in ferrimagnet driven by a circularly polarized magnetic field using the collective coordinate theory and atomistic micromagnetic simulations, and we pay particular attention to the effect of Dzyaloshinskii–Moriya interaction (DMI). Similar to the case of antiferromagnetic domain wall, ferrimagnetic wall moves at a speed which is linearly dependent on the DMI magnitude. In addition, it is revealed that the DMI plays a role in modulating the domain wall dynamics similar to that of the net spin density, which suggests another internal parameter for controlling domain wall in ferrimagnets. Moreover, the results show that the domain wall dynamics in ferrimagnets is much faster than that in ferromagnets, which confirms again the great potential of ferrimagnets in future spintronic applications.Graphical abstract