Modeling stress effects on magnetic hysteresis and Barkhausen emission using a hysteretic-stochastic model

A magnetic model has been developed which provides a self-consistent description of the effects of stress on hysteresis loop and Barkhausen effect (BE) signals. The BE signal was calculated based on the hysteretic-stochastic process model of domain wall dynamics, which has been extended to include the magnetomechanical effect. For comparison, hysteresis loops and BE signals were measured in materials subjected to various tensile and compressive stresses within the elastic limit. The stress dependence of the modeled BE signals and hysteresis loop properties such as coercivity and remanence was found to be in good agreement with the experimental results.