Effective dynamic susceptibility of a one-dimensional array of ferromagnetic wires

R. Zivieri
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引用次数: 1

Abstract

In this paper the calculation of the effective dynamic susceptibility for a one-dimensional array of permalloy rectangular nanowires periodic along the in-plane x direction is presented. The external magnetic field is assumed aligned along the long side of the wires (y direction) and the in-plane Bloch wave vector is along the wires width (x direction). The calculation is performed by means of a finite-difference micromagnetic approach, the Lagrangian-based dynamical matrix method. It is shown that the excited spin-wave mode is always the quasi-uniform or fundamental mode of the spectrum. This spin excitation has a non-uniform amplitude along the wire width due to confinement with no nodal planes and can be regarded as the metamaterial wave of the one-dimensional periodic system.
一维铁磁线阵列的有效动态磁化率
本文计算了沿平面内x方向周期性排列的一维坡莫合金矩形纳米线的有效动态磁化率。假设外磁场沿导线长侧(y方向)排列,面内布洛赫波矢量沿导线宽度(x方向)排列。计算采用有限差分微磁方法,即基于拉格朗日的动力矩阵法。结果表明,受激自旋波模式总是光谱的准均匀模式或基模。由于无节面约束,该自旋激发沿线宽方向振幅不均匀,可视为一维周期系统的超材料波。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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