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A homogenized energy framework for ferromagnetic hysteresis

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4 Author(s)
R. C. Smith ; Dept. of Math., North Carolina State Univ., Raleigh, NC ; M. J. Dapino ; T. R. Braun ; A. P. Mortensen

This paper focuses on the development of a homogenized energy model which quantifies certain facets of the direct magnetomechanical effect. In the first step of the development, Gibbs energy analysis at the lattice level is combined with Boltzmann principles to quantify the local average magnetization as a function of input fields and stresses. A macroscopic magnetization model, which incorporates the effects of polycrystallinity, material nonhomogeneities, stress-dependent interaction fields, and stress-dependent coercive behavior, is constructed through stochastic homogenization techniques based on the tenet that local coercive and interaction fields are manifestations of underlying distributions rather than constants. The resulting framework incorporates previous ferromagnetic hysteresis theory as a special case in the absence of applied stresses. Attributes of the framework are illustrated through comparison with previously published steel and iron data

Published in:

IEEE Transactions on Magnetics  (Volume:42 ,  Issue: 7 )