The Study of Magnetization Process in Amorphous FeNiSiB Microwires

We have studied the magnetization process in amorphous Fe49 6Ni27 9Si7 5B15 microwire It was found that the hysteresis mechanism consists of two contributions magnetoelastic and structural relaxation It was shown that at low frequencies, the magnetization process is controlled mainly by the structural relaxation At higher frequencies (above 50 Hz), the relaxation effect disappears and switching field is determined mainly by the magnetoelastic contribution Moreover, the effect of thermal treatment at temperature 300 degrees C has been studied As cast microwire is almost unsensible to the applied tensile stress since the applied stresses are lower than that induced during production After annealing, the stresses relax and stress sensibility of microwires increases