Vector Preisach modeling

Abstract

A vector hysteresis model for particulate media has been developed and applied to a two-dimensional, self-consistent simulation of the magnetic recording process. Vector modeling is accomplished using a scalar Preisach model recording process. Vector modeling is accomplished using a scalar Preisach model for each of the two perpendicular directions, with each model responding to the corresponding component of the applied field. The Preisach density function is factored to permit description of hysteretic behavior based solely on the major loop. Each scalar Preisach model is partially demagnetized by the corresponding perpendicular field component. This feature couples the models and provides a substantial degree of reversibility with respect to rotating applied fields. Vector model performance was tested by the degradation of the longitudinal remanent moment as a function of vertical applied field. This model has been successfully used in a recording simulation.