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首页> 外文期刊>Applied Physics Letters >Evidence of an embedded vortex translation mode in flake-shaped ferromagnetic particle composites
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Evidence of an embedded vortex translation mode in flake-shaped ferromagnetic particle composites

机译：片状铁磁颗粒复合材料内嵌涡旋平移模式的证据

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摘要

A low-frequency resonance (sub-GHz) is observed in microwave permeability spectra of anisotropic flake-shaped ferromagnetic particle composites. The resonance frequency of this peak increases linearly with the saturation magnetization of flakes, their aspect ratio, and the amplitude of a perpendicular static magnetic field. In addition, this resonance becomes extinct for a perpendicular RF exciting magnetic field. These experimental features are reproduced by an analytical model of vortex dynamics which militates in favor of an assignment of this low-frequency signal as an embedded vortex translation mode within a multidomain magnetic structure.
机译：在各向异性片状铁磁颗粒复合材料的微波渗透率谱中观察到低频共振（sub-GHz）。该峰的共振频率随薄片的饱和磁化强度，薄片的纵横比和垂直静磁场的幅度线性增加。另外，对于垂直的RF激励磁场，这种谐振消失了。这些实验特征通过涡旋动力学分析模型得以再现，该模型有利于将此低频信号分配为多域磁结构内的嵌入式涡旋平移模式。

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