Evaluation of statistical and mean field magnetostatic interactions using generalized 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 DeltaM plot is introduced as the area of the Generalized DeltaM plot against the starti ng 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 Delta M plot provides an efficient way of distinguishing between the effects of t he statistical and mean field interactions.