Control of the polarity of magnetization vortex by torsion
Control of the polarity of magnetization vortex by torsion
复制标题
通过扭转控制磁化涡旋的极性
DOI:
10.1063/1.4847375
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发表时间:
2013-12
影响因子:
4
通讯作者:
方辉
中科院分区:
文献类型:
--
作者:
方辉
The switching behavior of vortex polarity in a circular ferromagnetic nanodot subjected to torsion is investigated by using a real space phase field model, which explicitly includes the coupling between magnetization and mechanical strain. It is found that the vortex polarity of the nanodot can be switched by torsion when the sign of the torsion is opposite to that of vortex chirality whereas switching does not take place if the sign of torsion is the same as that of vortex chirality. The magneto-elastic coupling and demagnetization field play a decisive role in the polarity switching, which involves an intriguing interplay of magnetization, strain, and demagnetization. The results suggest another way to control vortex polarity by mechanical torsion other than magnetic field and electric current.
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