Application of Jiles-Atherton Model to Stress Induced Magnetic Two-Phase Hysteresis

Electrical steels, under the influence of compressive stress, are known to exhibit two distinct magnetic phases appearing in one hysteresis cycle: magnetic phases evolve due to 90 domain wall motion at lower magnetic fields and 180 domain wall motion at higher fields, with the transition occurring at a critical field over a transition region. This work employs an extended Jiles-Atherton model to describe such a two-magnetic-phase behavior on measurements made on conventional grain-oriented silicon steel samples under compressive stress applied along the rolling direction. The analysis of extended JA model relates transition field parameter to material parameters (such as magnetostriction and saturation magnetization) together with successful estimation of the value of tensile stress introduced by the coating on surface.