Differential isotropic model of ferromagnetic hysteresis: temperature dependence of saturation magnetization and cluster magnetic moment

Abstract

In the article, experimentally measured magnetization curves obtained on an amorphous Fe77.5Si7.5B15 ribbon at room and elevated temperatures are fit using the differential isotropic model of ferromagnetic hysteresis (DIMFH). The temperature dependence of the DIMFH model parameters is analyzed both in the ferromagnetic region and near the Curie temperature and is related to the size of magnetic clusters. The simple two-level model with Weiss approximation is used to fit the temperature dependence of saturation magnetization.