Calculation of saturation magnetostriction from measured second harmonics in 3% silicon steel

The profiles of the second-order harmonics during B-H hysteresis loop have been measured as functions of the tensile stress and the angle phi between H-field and [001] axis in 3% silicon steel. The observed harmonics profiles have been analyzed in terms of the nonlinear, asymmetric magnetic inductio n which reflects the domain reorientation under the field. The field interv al of the second harmonics is related to the nucleation and annihilation fi elds and a measurement method for the magnetostriction is proposed using th e harmonics profiles under tensile stress.