Energy based stochastic model for temperature dependent behavior of ferromagnetic materials

摘要

An energy based stochastic model for temperature dependent anhystereticmagnetization curves of ferromagnetic materials is proposed and bench markedagainst experimental data. This is based on the calculation of macroscopicmagnetic properties by performing an energy weighted average over all possibleorientations of the magnetization vector. Most prior approaches that employthis method are unable to independently account for the effect of bothinhomogeneity and temperature in performing the averaging necessary to modelexperimental data. Here we propose a way to account for both effectssimultaneously and benchmark the model against experimental data from ~5K to~300K for two different materials in both annealed (fewer inhomogeneities) anddeformed (more inhomogeneities) samples. This demonstrates that the independentaccounting for the effect of both inhomogeneity and temperature is necessary tocorrectly model temperature dependent magnetization behavior.