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Theoretical eddy-current permeability spectra of slabs with bar domains

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2 Author(s)
Chen, D.X. ; Instituto de Magnetismo Aplicado, Univ. Complutense de Madrid, Spain ; Munoz, J.L.

A systematic description of theoretical eddy-current permeability spectra of infinitely long and wide slabs with 180° bar domains is made for the classical model, the Pry-Bean and Polivanov model concerning the eddy-current anomaly owing to domain wall displacements (DWD), as well as a model dealing with the anomalous low-frequency eddy-current losses owing to domain magnetization rotations (DMR). A general case including both DWD and DMR is treated based on these models. Analytic formulas are given accompanied by numerical computations. The model results can be directly used in many practical cases. They also provide much information on the nature of eddy-current losses. To explain these, extensive discussions are made, in which concepts such as the equivalent circuit, the classical, localized, and lateral eddy currents, the separate and superimposed eddy currents, and the skin effect are clarified

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 3 )