It is reported that the magnitude dispersion and the angular dispersion of the anisotropy energy in permalloy films can be measured by means of the ferromagnetic absorption measurement at a radio frequency of about 0.5 Mc/s. Principles of the method for dispersion measurement are developed here on the basis of a particle domain model. The experimental setup as well as the results obtained are also shown.
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Uchiyama et al. (1963) studied this question.
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