Magnetization reversal in asymmetric Co rings studied by micromagnetic simulation
Magnetization reversal in asymmetric Co rings studied by micromagnetic simulation
复制标题
通过微磁模拟研究不对称Co环的磁化反转
DOI：
10.1063/1.4863807
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发表时间：
2014-01
影响因子：
3.2
通讯作者：
ong
中科院分区：
文献类型：
--
作者：
Xu, Feng;Wei, Jun;Tan, Weishi;Li, Sh;ong
先前的模拟报告表明，在具有全局涡旋态的非对称环中，磁化反转机制由畴壁运动主导。本文对大尺寸、厚臂非对称钴环进行了数值模拟。结果表明，磁化反转过程主要由局域涡旋态的形成、运动和湮灭所控制。内核偏心90°有利于获得稳定的手征可控的整体涡旋态。90°偏心距越大或厚度越厚，整体涡态的稳定性越高。然而，在这些环中的剩磁不能获得整体涡旋状态。在较小的环中，由于在剩磁处获得了整体涡旋态，随着内核尺寸的增大，整体涡旋态的稳定性增强，这是由于形成局域涡旋态的可能性降低。
Previous simulation reports have shown that the magnetization reversal mechanism in the asymmetric rings with the global vortex state is dominated by domain wall movement. This work investigates the asymmetric Co rings with relatively large sizes and thick arms with simulation. Results show that the magnetization reversal processes are dominated by the formation, movement, and annihilation of localized vortex states. 90° decenter of the inner core is favorable for a stable global vortex state with controllable chirality. Either a larger 90° decenter distance or a thicker thickness brings about a higher stability of global vortex state. However, the global vortex state cannot be obtained at remanence in these rings. In the smaller rings, with the global vortex state obtained at remanence, the stability of global vortex state is enhanced when the inner core size grows larger, and it is due to the reduced possibility of the formation of localized vortex state.
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影响因子：
8.6
作者：
F. Zhu;G. Chern;O. Tchernyshyov;X. Zhu;J. Zhu;C. Chien
通讯作者：
F. Zhu;G. Chern;O. Tchernyshyov;X. Zhu;J. Zhu;C. Chien
影响因子：
3.2
作者：
X. Wang;W. K. Peng;W. Lew
通讯作者：
X. Wang;W. K. Peng;W. Lew
影响因子：
8.6
作者：
Cowburn, RP;Koltsov, DK;Tricker, DM
通讯作者：
Tricker, DM
影响因子：
4
作者：
Kläui, M;Rothman, J;Cui, Z
通讯作者：
Cui, Z
影响因子：
2.1
作者：
Chao-Hsien Huang;Nian Jia Cheng;Feng-Sheng Wu;J. Wu;L. Horng
通讯作者：
Chao-Hsien Huang;Nian Jia Cheng;Feng-Sheng Wu;J. Wu;L. Horng