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The magnetic properties of a random assembly of uniaxial noninteracting particles are considered on the basis of two extreme mechanisms of irreversible magnetization changes: (a) coherent, and (b) completely incoherent reversals. The bulk properties are determined as weighted averages, the weighting factor f(H0)corresponding to the variation of the critical field H0. Special integral expressions involving the bulk properties are independent of f, and may thus be used to differentiate between the mechanisms (a) and (b). Methods are suggested for determining f from the field dependence of the properties considered. An approximate criterion for neglecting particle interaction in this analysis is given.
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Shtrikman et al. (1961) studied this question.
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