Experimental Realization of the 1D Random Field Ising Model
Experimental Realization of the 1D Random Field Ising Model
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DOI：
10.1103/physrevlett.127.207203
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发表时间：
2021-11-11
影响因子：
8.6
通讯作者：
Schiffer, P.
中科院分区：
文献类型：
--
作者：
Bingham, N. S.;Rooke, S.;Schiffer, P.
我们在相互作用的纳米磁体的方形人造自旋冰阵列中测量了磁场引起的雪崩。从基态有序结构开始，我们在每次连续应用逐渐增加的场后对单个纳米磁体力矩进行成像。矩构形演化的统计结果与规范一维随机场伊辛模型吻合良好。我们从对阵列集体行为的宏观测量中提取有关阵列微观结构的信息，展示了一个可以应用于其他表现出雪崩的系统的过程。
We have measured magnetic-field-induced avalanches in a square artificial spin ice array of interacting nanomagnets. Starting from the ground state ordered configuration, we imaged the individual nanomagnet moments after each successive application of an incrementally increasing field. The statistics of the evolution of the moment configuration show good agreement with the canonical one-dimensional random field Ising model. We extract information about the microscopic structure of the arrays from our macroscopic measurements of their collective behavior, demonstrating a process that could be applied to other systems exhibiting avalanches.