Demagnetized-state dependence of Henkel plots. I. The Preisach model

Abstract

The interpretation of interaction through Henkel plots and Δm plots has become popular in recent years; however, the demagnetized state is often not specified. In this paper, the demagnetized state dependence of Henkel plots is calculated using the classical Preisach model, the moving model, and the complete-moving-hysteresis model. In the calculation of the virgin remanence curve, ac, dc+, and dc− demagnetized states were used. The resulting collection of Henkel plots contains examples of ‘‘up’’ and ‘‘down’’ deviations from the Wohlfarth line by changing the demagnetized state only.