THE EFFECT OF MECHANICAL-STRESS ON A BARKHAUSEN NOISE SIGNAL INTEGRATED ACROSS A CYCLE OF RAMPED MAGNETIC-FIELD

Experimental Barkhausen data are presented for XC10 French steel at va rious stress levels. The experimental data show an apparent almost lin ear correlation with stress of W-H (hysteresis loss) and W-BN (Barkhau sen noise amplitude integrated over H). A model previously suggested b y Sablik for Barkhausen noise stress and field dependence is used for analysis of the experimental data. With slight modifications of the pr evious model, it has been possible to produce semiquantitative fits to the Barkhausen peaks as a function of H while at the same time obtain ing the apparent linear correlation between W-H and W-BN and stress, T he model suggests however that the apparent linear correlation may onl y apply to certain types of materials. In addition, the fit to experim ent suggests that additional refinements to the model may yet be neces sary. (C) 1996 American Institute of Physics.