Abstract
A mathematical model of magnetic hysteresis loops for weak ac magnetic fields, which is applicable for both symmetrical hysteresis loops that are described by the Rayleigh law of magnetization and asymmetrical loops that are not, has been formulated. The asymmetrical hysteresis loops take place when the ferromagnet is affected, along with an ac magnetizing field, by a dc field. The frequency spectrum of a ferromagnet magnetization has been analyzed as a time function. A technique for experimental determination of parameters that enter into this model is proposed, which uses amplitudes and phases of the first three magnetization harmonic components (the first, the second, and the third ones).
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