Magnetic vortex gyration affected by Dzyaloshinskii-Moriya interaction
Magnetic vortex gyration affected by Dzyaloshinskii-Moriya interaction
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DOI：
10.1063/1.4919423
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发表时间：
2015-04
影响因子：
3.2
通讯作者：
Yongming Luo;C. Zhou;C. Won;Yizheng Wu
中科院分区：
文献类型：
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作者：
Yongming Luo;C. Zhou;C. Won;Yizheng Wu
通过微磁学模拟系统地研究了Dzyaloshinskiii-Moriya相互作用对磁涡旋旋转的影响。结果表明，对于左右旋向涡系，双旋向涡系可以提高涡系旋转本征频率的简并度。对于由面内交流谐振场激发的涡旋旋转，双折射可以强烈地影响旋转幅度和核心切换的临界场，这取决于双折射的符号和涡旋旋向性。当涡核接近盘边缘时，DMI诱导的边缘状态对涡核的旋转有很强的影响。
The effect of the Dzyaloshinskii–Moriya interaction (DMI) on magnetic vortex gyration is investigated systematically through micromagnetic simulations. Our results show that the DMI can lift the degeneracy of vortex gyration eigenfrequencies for vortices with left- and right-handedness. For vortex gyration excited by an in-plane AC resonant field, the DMI can strongly influence the gyration amplitude and the critical field for core switching, depending on the sign of the DMI and the vortex handedness. The DMI-induced edge state has a strong effect on the vortex core gyration as the core approaches the disk edge.