Depinning of vortex domain walls from an asymmetric notch in a permalloy nanowire
Depinning of vortex domain walls from an asymmetric notch in a permalloy nanowire
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从坡莫合金纳米线中的不对称凹口脱钉涡旋畴壁
DOI：
10.1063/1.4745788
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发表时间：
2012-08-20
影响因子：
4
通讯作者：
Xu, Yongbing
中科院分区：
文献类型：
--
作者：
Zhu, Weiwei;Liao, Jialin;Xu, Yongbing
利用聚焦磁光克尔效应（MOKE）磁强计和微磁学模型研究了具有非对称切口的平面磁性纳米线中涡旋畴壁（DW）的脱钉过程.通过单次MOKE测量直接观察到两个不同的退钉扎场。微磁建模提供了物理洞察的细节，如何在不对称的缺口发展的脱钉过程中，并揭示了不同的脱钉场起源于不同的手征的涡旋DW。
The mechanism of depinning process of vortex domain wall (DW) in a planar magnetic nanowire with an asymmetric notch is investigated by using focused magneto-optical Kerr effect (MOKE) magnetometer and micromagnetic modeling. Two distinct depinning fields are directly observed by the single-shot MOKE measurements. Micromagnetic modeling provides physical insight into the details of how the depinning process develops at the asymmetric notch and reveals that the different depinning fields originate from the different chiralities of the vortex DWs.