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MODELING AND CHARACTERIZATION BY MEANS OF THE MAGNETIC DISPERSION

D. A. Iordache1,* , L. Daniello1, St. Pusca1, V. Iordache1

Affiliation

  1. Physics Department, University “Politehnica”, 77206-Bucharest, Romania

Abstract

In 1978, we pointed out firstly the frequency power law dependence of the viscous friction coefficient corresponding to the magnetization walls oscillations for the low frequency part (of interest in Electronics) of the magnetization permeability dispersion of some spinelic ferrimagnetic materials. A similar dependence was found approx. concomitantly for the quality factor corresponding to ultra-sounds propagation in certain media. The present work analyzes several phenomenological models of the magnetic dispersion and points out the common “denominator” of the oscillations of the mesoscopic domains corresponding to the magnetization walls and to the elastic media grains, respectively. The obtained results allow rather simple and accurate descriptions of the magnetic dispersion of ferrimagnetic materials, in the frequency domain of major interest for Electronics..

Keywords

Magnetic dispersion, Frequency power laws, Elastic waves attenuation, Mesoscopic domains, Viscous friction coefficient.

Submitted at: April 26, 2004
Accepted at: June 22, 2004

Citation

D. A. Iordache, L. Daniello, St. Pusca, V. Iordache, MODELING AND CHARACTERIZATION BY MEANS OF THE MAGNETIC DISPERSION, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 995-1000 (2004)