Broadband Permeability Spectra of Flake-Shaped Ferromagnetic Particle Composites - Archive ouverte HAL
Article Dans Une Revue IEEE Transactions on Magnetics Année : 2017

Broadband Permeability Spectra of Flake-Shaped Ferromagnetic Particle Composites

Résumé

Broadband permeability spectra of aligned ferromagnetic flakes embedded in a nonmagnetic polymer matrix have been measured using an APC-7 coaxial line within the frequency range 10 MHz–18 GHz. These spectra reveal two well-defined resonance lines. The low-frequency one (sub-GHz range) has previously been attributed to the fundamental vortex translation mode in a multidomain magnetic structure, whereas the high-frequency resonance (beyond 1 GHz) is assigned to the natural spin resonance. A two-level analytical model combining a spin dynamics description including these two contributions at the flake scale and a Maxwell–Garnett mixing rule at the composite scale has been developed and reproduces very satisfactorily the experimental spectra in terms of resonance frequencies, resonance linewidths, and resonance mode amplitudes.
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Dates et versions

hal-01632757 , version 1 (10-11-2017)

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Citer

Z. Raolison, Q. Clement, A.-L. Adenot-Engelvin, N. Mallejac, C. Lefevre, et al.. Broadband Permeability Spectra of Flake-Shaped Ferromagnetic Particle Composites. IEEE Transactions on Magnetics, 2017, 53 (11), ⟨10.1109/TMAG.2017.2735943⟩. ⟨hal-01632757⟩
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