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arXiv 2201.08624cond-mat.mtrl-sci
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跨 RuX 层非共线磁化耦合的起源

On the origin of noncollinear magnetization coupling across RuX layers

Claas Abert, Sabri Koraltan, Florian Bruckner, Florian Slanovc, Juliana Lisik, Pavlo Omelchenko, Erol Girt, Dieter Suess

AI总结:

本文提出三维原子尺度模型,描述含 Ru 与铁磁原子混合间隔层中的非共线磁化耦合,能更准确预测耦合常数随成分和厚度的变化,并适用于无限刚性铁磁层。

摘要:

我们提出了一个简单的原子尺度模型,用于描述磁性多层膜中的非共线耦合;这些多层膜具有由 Ru 与 Fe 等铁磁性原子合金化形成的混合间隔层。与以往通过耦合常数的横向涨落来解释非共线耦合的解析模型和微磁模型不同,所提出模型考虑了间隔层内全部三个空间维度上的原子—原子耦合。该新模型能够准确预测宏观双线性和双二次耦合常数对间隔层成分与厚度的依赖关系,表现出远优于横向涨落模型的定量一致性。此外,它甚至对无限刚性的铁磁层也预测出非共线耦合,这超出了以往模型的预测范围。

英文摘要:

We present a simple atomistic model for the description of noncollinear coupling in magnetic multilayers with hybrid spacer layers made of Ru alloyed to ferromagnetic atoms such as Fe. In contrast to previous analytical and micromagnetic models that explain the noncollinear coupling by means of lateral fluctuations in the coupling constant, the presented model accounts for atom-atom coupling in all three spatial dimensions within the spacer layer. The new model is able to accurately predict the dependence of the macroscopic bilinear and biquadratic coupling constants on the spacer-layer composition and thickness, showing much better quantitative agreement than lateral-fluctuation models. Moreover, it predicts noncollinear coupling even for infinitely stiff ferromagnetic layers which goes beyond the predictions of previous models.

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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