Evaluation of statistical and mean field magnetostatic interactions using generalized /spl Delta/M plots: experiments and Preisach modeling

A new method for evaluation of the statistical and mean interaction fields in a particulate system is described. The Integral Generalized /spl Delta/M plot is introduced as the area of the Generalized /spl Delta/M plot against the starting remanent magnetic moment for the corresponding remagnetization process. This new plot is sensitive to the shape of the interaction distribution and to the value of the mean interaction field. The Integral Generalized /spl Delta/M plot provides an efficient way of distinguishing between the effects of the statistical and mean field interactions.