The effect of internal stresses on the magnetization curve of amorphous ferromagnetic FeNi alloys

The Rayleigh region, the coercive field and the magnetization curves of the amorphous, ferromagnetic alloys Fe80−xNixB20 and Fe40Ni40P14B6 have been investigated as a function of the temperature and composition. It is shown that the characteristic parameters of the magnetization curves can be described by the statistical potential theory as developed previously for the movement of domain walls. Our experimental results are compatible with the assumption that the obstacles opposing the domain wall displacements are elastic stress centres produced during the rapid quenching process of the amorphous alloys.