The use of the generalised ΔM plots in the characterisation of the Preisach distribution of magnetic recording media

Abstract The generalised Δ M (GDM) plots are obtained using the remagnetisation curves for different initial remanent states of the particulate system. This paper presents a way of identifying the Preisach distribution using the remagnetisation curves taking into account a linear mean field term and a reversible part of magnetisation on the first bisector of the Preisach plane.