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Rayleigh hysteresis--A new look at an old law

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1 Author(s)
Baldwin, John A. ; University of California, Santa Barbara, CA

Experimental evidence is cited that, for very small hysteresis loops, the remanent magnetic flux density Bris not proportional to the square of the amplitude of the magnetic field excursion H1(as given by the Rayleigh relation), but rather to the first power. It is shown that (subject to one very general assumption), were this dependence exact, it would lead to negative hysteresis loss. It is also shown that (subject to the same assumption) any power-series dependence ofBonHwill always giveB_{r} propto Hmin{1}max{2}. An approximate first-power dependence is found to follow naturally from the spring model. A new Rayleigh relation is proposed which contains a logarithmic term which may not be expanded in a power series about zero argument.

Published in:

Magnetics, IEEE Transactions on  (Volume:14 ,  Issue: 2 )

Date of Publication:

Mar 1978

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