arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.01766cond-mat.mtrl-sci
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反相边界在磁铁矿薄膜中磁畴形成中的作用

Role of anti-phase boundaries in the formation of magnetic domains in magnetite thin films

Roberto Moreno, Sarah Jenkins, Vlado K. Lazarov, Richard F. L. Evans

摘要:

反相边界(APB)是结构缺陷,已被证明是负责在不同的纳米结构中观察到的异常磁行为。了解它们的特性对于通过以受控的方式生长APB来使用它们来调节磁性材料的特性至关重要,因为它们的密度强烈依赖于合成方法。有了这个目标,在这项工作中,我们调查他们的影响磁铁矿(Fe $_3$ O $_4$)薄膜考虑原子自旋模型,重点研究交换相互作用的作用,发挥整个APB接口。我们的结论是,我们在这里提出的模型很好地描述了在这种材料中实验报告的主要非典型特征,证实了APB中创建的新交换相互作用是导致这种偏离散装性能的原因。

英文摘要:

Anti-phase boundaries (APBs) are structural defects which have been shown to be responsible for the anomalous magnetic behaviour observed in different nanostructures. Understanding their properties is crucial in order to use them to tune the properties of magnetic materials by growing APBs in a controlled way since their density strongly depends on the synthesis method. With this aim, in this work we investigate their influence on magnetite (Fe$_3$O$_4$) thin films by considering an atomistic spin model, focusing our study on the role that the exchange interactions play across the APB interface. We conclude that the main atypical features reported experimentally in this material are well described by the model we propose here, confirming the new exchange interactions created in the APB as the responsible for this deviation from bulk properties.

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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