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Application of the Preisach and Jiles–Atherton models to the simulation of hysteresis in soft magnetic alloys

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4 Author(s)
Pasquale, M. ; IEN Galileo Ferraris and INFM, Corso Massimo D’Azeglio 42, 10125 Torino, Italy ; Bertotti, G. ; Jiles, D.C. ; Bi, Y.

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This article describes the advances in unification of model descriptions of hysteresis in magnetic materials and demonstrates the equivalence of two widely accepted models, the Preisach (PM) and Jiles–Atherton (JA) models. Recently it was shown that starting from general energy relations, the JA equation for a loop branch can be derived from PM. The unified approach is here applied to the interpretation of magnetization measured in nonoriented Si–Fe steels with variable grain size , and also in as-cast and annealed Fe amorphous alloys. In the case of NO Fe–Si, the modeling parameter k defined by the volume density of pinning centers is such that k≈A+B/, where the parameters A and B are related to magnetocrystalline anisotropy and grain texture. The value of k in the amorphous alloys can be used to estimate the microstructural correlation length playing the role of effective grain size in these materials. © 1999 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:85 ,  Issue: 8 )

Date of Publication:

Apr 1999
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