Angular-dependent magnetization reversal processes in artificial spin ice
Angular-dependent magnetization reversal processes in artificial spin ice
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DOI：
10.1103/physrevb.92.214425
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发表时间：
2015-12
影响因子：
3.7
通讯作者：
D. M. Burn;M. Chadha;W. Branford
中科院分区：
文献类型：
--
作者：
D. M. Burn;M. Chadha;W. Branford
通过实验性磁光克尔效应（MOKE）测量和微磁模拟，研究了相互连接的戈薇人工自旋冰结构中磁化反转的角度依赖性。这种反转是通过磁畴壁沿互连条的传播来介导的，磁畴壁要么在顶点处成核，要么在相邻顶点相互作用后到达。这些过程中的物理差异显示出明显的角度依赖性，从而可以确定不同的影响因素。系统局部或整个子晶格上的初始磁化状态配置在一定的磁场窗口内控制着阵列的反转特性。这表明了如何操纵可用的磁化反转路径以及如何训练系统。
The angular dependence to the magnetization reversal in interconnected kagome artificial spin ice structures has been studied through experimental MOKE measurements and micromagnetic simulations. This reversal is mediated by the propagation of magnetic domain walls along the interconnecting bars which either nucleate at the vertex or arrive following an interaction in a neighbouring vertex. The physical differences in these processes show a distinct angular dependence allowing the different contributions to be identified. The configuration of the initial magnetization state, either locally or on a full sublattice of the system, controls the reversal characteristics of the array within a certain field window. This shows how the available magnetization reversal routes can be manipulated and the system trained.