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首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Effects of layering on the magnetostatic interactions in microstructures of Co_xCu_(1-x)/Cu nanowires
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Effects of layering on the magnetostatic interactions in microstructures of Co_xCu_(1-x)/Cu nanowires

机译：分层对Co_xCu_（1-x）/ Cu纳米线微观结构中静磁相互作用的影响

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摘要

Arrays of electrodeposited CoCu/Cu multilayered nanowires have been characterized by ferromagnetic resonance and magnetometry measurements in order to study the effect of the dipolar interactions on the effective anisotropy field as a function of the magnetic and nonmagnetic layer thicknesses. Breaking the continuous cylinder geometry results in a reduction of the effective anisotropy field, which can be modified over a large range of values starting from 7 kOe in the case of nonlayered continuous nanowires down to nearly zero for the thinnest magnetic layers. An analytical model is presented to describe the magnetostatic interactions between magnetic layers and their effect on the total anisotropy field which shows a very good agreement with the experiments. Moreover, the model allows generalizing the description of the effective magnetostatic field as a function of the aspect ratio of both the magnetic and the nonmagnetic layers for multilayered nanowires of any combination of materials. A general anisotropy diagram is presented that describes the geometrical conditions required to obtain an easy axis parallel or perpendicular to the wire axis, thus providing a guide for the engineering and fine-tuning of the magnetic properties of these systems.
机译：电沉积CoCu / Cu多层纳米线的阵列已通过铁磁共振和磁力测量进行了表征，以研究偶极相互作用对有效各向异性场的影响，该各向异性是磁性和非磁性层厚度的函数。破坏连续圆柱体的几何形状会导致有效各向异性场的减小，可以在从7 kOe开始的较大值范围内进行修改（对于无层连续纳米线，对于最薄的磁性层，该值减小至几乎为零）。提出了一个分析模型来描述磁性层之间的静磁相互作用及其对总各向异性场的影响，这与实验非常吻合。此外，该模型允许根据任何材料组合的多层纳米线，将有效静磁场的描述概括为磁性层和非磁性层的纵横比的函数。提出了一个一般的各向异性图，该图描述了获得平行于或垂直于导线轴的易轴所需的几何条件，从而为这些系统的磁性能的工程设计和微调提供了指南。

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