Abstract

It is shown, that the description of the time development of the magnetic moment of superparamagnetic particles in terms of the dis crete orientations model is the main reason of the distinction between the theoretical and experimental spectra. The model of the time development of magnetic moment which takes into account the jumps from one easy direction to another as weIl as the precession at the time between the jumps, gives a reasonable explanation for the broadening and the asymmetry of the experimental lines.

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