The Preisach diagram, Wohlfarth's remanence formula and magnetic interactions

Generalised Preisach diagram (moving model) was applied to study magnetic interactions in weak magnetic samples (natural pyrrhotite-bearing rocks). The approach was applied to experimental data and verified using differential remanence derived from a Wohlfarth's remanence formula. It is shown that introducing the mean interaction field improves the Preisach diagram and negative, positive and even oscillating type of interactions, as observed using the Wohlfarth's remanence formula, can be elucidated and interpreted.<
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