Gyroresonance in unsaturated composite bodies: Experiments and theory | Zendy

Jean-Luc Mattéi | Zendy; D. Bariou | Zendy; Alexis Chevalier | Zendy; Marcel Le Floc'H | Zendy

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Gyroresonance in unsaturated composite bodies: Experiments and theory

Author(s) -

Jean-Luc Mattéi,

D. Bariou,

Alexis Chevalier,

Marcel Le Floc'H

Publication year - 2000

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.373220

Subject(s) - materials science , ferrite (magnet) , permeability (electromagnetism) , composite number , condensed matter physics , composite material , nuclear magnetic resonance , volume fraction , physics , chemistry , biochemistry , membrane

International audienceThe permeability spectra of composite magnetic materials (NiZn ferrite composites and YIG composites) has been experimentally studied on a wide range in magnetic load C. The resonance frequency decreases with the increasing magnetic load of the mixture. This is attributed to the fading of the magnetic pole on the surface of the magnetic inclusions. A theory is developed which is intended to give an expression for the gyroresonance frequency of magnetic composites in their unsaturated magnetic state. It fits the experimental data over its full range of volume fraction C without any corrective factors. The proposed relation, which is an extension of the Kittel's expression for the resonance frequency of a saturated body, points out a noteworthy close link between the concept of reciprocity and the one of demagnetization

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