论文标题
使用磁场访问对称性隔离的正方形人工旋转冰顶点中的低能磁微晶格
Accessing low-energy magnetic microstates in symmetry-broken isolated square artificial spin ice vertices with magnetic field
论文作者
论文摘要
在人造自旋冰系统中，缺陷和偶极相互作用的相互作用有望在稳定不同的集体磁性状态中起重要作用。在这项工作中，我们研究了单个有缺陷的正方形人工旋转冰分顶点的磁化逆转，在该方面，缺陷的系统破坏了系统的四倍旋转对称性。通过改变顶点的施加场和几何轴之间的角度，我们观察到系统的能量景观变化，导致集体低能磁状态的稳定。我们还观察到，通过更改角度，可以访问不同的顶点配置。进行微磁模拟以不同的角度和外场进行，其结果与实验数据一致。
In artificial spin ice systems, an interplay of defects and dipolar interactions is expected to play important roles in stabilizing different collective magnetic states. In this work, we investigated the magnetization reversal of individual defective square artificial spin ice vertices where defects break four-fold rotational symmetry of the system. By varying the angle between the applied field and the geometrical axis of the vertices, we observe a change in energy landscape of the system resulting into the stabilization of collective low-energy magnetic states. We also observe that by changing the angle, it is possible to access different vertex configurations. Micromagnetic simulations are performed for varying angle as well as external field, the results of which are consistent with the experimental data.
