Investigation of Rayleigh region in strip like amorphous FINEMET samples after different heat treatments

Abstract In this paper we have investigated the influence of thermal treatment on magnetization processes in the low magnetic field range (Rayleigh region). For this study, rapidly quenched FINEMET ribbons in the as-prepared amorphous state were used. It has been observed that the various annealing temperature lead to the different behavior of a studied material as a consequence of a relaxation of the quenched-in internal stresses in the investigated samples. However, neither of the effects of the atomic diffusion has been observed after low temperature heat-treatments. Moreover, it was detected that the partial elimination of internal stresses has a reduction effect on total magnetic anisotropy.