Edge effects on Dzyaloshinskii domain wall tilting
Edge effects on Dzyaloshinskii domain wall tilting
复制标题
Dzyaloshinskii 磁畴壁倾斜的边缘效应
DOI:
10.1016/j.jmmm.2019.04.063
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发表时间:
2019-09
影响因子:
2.7
通讯作者:
Yang Xiaofei
中科院分区:
文献类型:
--
作者:
Shen Maokang;Zhang Yue;Luo Wei;You Long;Yang Xiaofei
Interfacial Dzyaloshinskii-Moriya interaction (DMI) of a heavy metal (HM)/ferromagnetic (FM) metal heterostructure is vital to the current-induced fast domain wall motion. The tilting of the moving Dzyaloshinskii domian wall (DW) has been paid much attention. In this work, using the micromagnetic simulation, we find the DW tilting is originated from different initial DW velocity at two edges because of the initialantisymmetricmagnetic structure at two edges. In the very early stage of DW motion, the DMI energy traps the DW motion at one edge. For a track whose width is smaller than a critical value, the edge effect plays a major role for DW tilting. This modifies the track width dependence of tilting angle and relaxation time derived from the collective coordinate method without considering edge effect. When the track is wide enough, a temporary vortex-like moment structure inside DW and variation of DW chirality at the edge appear in the process of generating DW tilting for reducing DMI and demagnetization energy.
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