Dynamic interaction between domain walls and nanowire vertices
Dynamic interaction between domain walls and nanowire vertices
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DOI：
10.1103/physrevb.90.144414
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发表时间：
2014-10-13
影响因子：
3.7
通讯作者：
Branford, W. R.
中科院分区：
文献类型：
--
作者：
Burn, D. M.;Chadha, M.;Branford, W. R.
研究了磁畴壁作用在三纳米线之间y形连接处的动力学行为。畴壁微磁结构的细节和顶点处的局部自旋织构导致了复杂的相互作用，最终决定了畴壁沿顶点的传播方向。这种相互作用已经通过磁光克尔效应实验和单顶点结构的微磁模拟进行了探索。动力区入射畴壁微磁结构的差异对相互作用有显著影响。我们观察到振荡路径选择随着顶点前的畴壁传播距离的增加而增加。我们的分析表明，这种行为源于由于沃克击穿过程引起的横向畴壁手性的循环逆转。
The dynamic behavior of magnetic domain walls incident upon a Y-shaped junction between three nanowires is explored. Details in the micromagnetic structure of the domain wall and the local spin texture at a vertex result in a complex interaction which ultimately determines the propagation direction of the domain wall following the vertex. This interaction has been explored through both magneto-optical Kerr effect experiments and micromagnetic simulations on single-vertex structures. Differences in the micromagnetic structure of incident domain walls in the dynamic regime have a significant influence on the interaction. We observe an oscillatory path selection with increasing domain wall propagation distance preceding the vertex. Our analysis shows that this behavior originates from cyclic reversals of the transverse domain wall chirality due to Walker breakdown processes.