Comparative study of the thermal fluctuations effects on the classical Stoner-Wohlfarth and analytical vector hysteron models

Abstract

In this work we present a comparative study of the classical Stoner Wohlfarth model and the analytical vector hysteron model. We analyze the hysteretic behavior description when the thermal fluctuations are included. We found a different behavior in the evolution of the coercive field as function of temperature for the vector hysteron model when the anisotropy easy axis is non-parallel to the magnetic field orientation. At low temperatures a plateau is observed as consequence of the switching field behavior. At high temperature both models give identical description of the magnetization behavior, which merges with the superparamagnetic approximation.