Article Dans Une Revue Applied Physics Letters Année : 2013

Evidence of an embedded vortex translation mode in flake-shaped ferromagnetic particle composites

J. Neige
  • Fonction : Auteur
T. Lepetit
  • Fonction : Auteur
N. Malléjac
  • Fonction : Auteur
A.-L. Adenot-Engelvin
  • Fonction : Auteur
N. Vukadinovic
  • Fonction : Auteur

Résumé

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.

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Dates et versions

hal-04882895 , version 1 (13-01-2025)

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J. Neige, T. Lepetit, N. Malléjac, A.-L. Adenot-Engelvin, A. Thiaville, et al.. Evidence of an embedded vortex translation mode in flake-shaped ferromagnetic particle composites. Applied Physics Letters, 2013, 102 (24), ⟨10.1063/1.4811375⟩. ⟨hal-04882895⟩
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