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arXiv 1909.04700cond-mat.mes-hall
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缺陷正方形人工自旋冰系统中偶极耦合纳米磁体的微磁行为

On the micromagnetic behavior of dipolar-coupled nanomagnets in defective square artificial spin ice systems

Neeti Keswani, Pintu Das

摘要:

我们在这里报告的结果,微磁模拟的方形人工自旋冰(ASI)系统的缺陷。缺陷是由纳米磁体在顶点处的错位引入的。在这些亏损系统中,我们能够通过施加一个小的外场来稳定涌现的类抛物态。我们观察到系统的偶极能量的变化与不同的失调角。产生出射单极子的场随系统的偶极能量线性变化。我们的研究结果清楚地表明,ASI系统的磁化反转是错综复杂的缺陷和偶极相互作用的相互作用。

英文摘要:

We report here the results of micromagnetic simulations of square artificial spin ice (ASI) systems with defects. The defects are introduced by misaligning of a nanomagnet at the vertex. In these defective systems, we are able to stabilize emergent monopole-like state by applying a small external field. We observe a systematic change of dipolar energies of the systems with varying misalignment angle. The fields at which the emergent monopoles are created vary linearly with the dipolar energies of the systems. Our results clearly show that the magnetization reversal of the ASI systems is intricately related to the interplay of defects and dipolar interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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