Temperature dependence of permeability in amorphous alloys

For amorphous Fe-Ni based alloys, the temperature dependence of the permeability μ(T) and of the coercive field strength Hc(T) was studied for different shapes of hysteresis loops. It was found that μ (T) and Hc(T) can be described in terms of the temperature dependence of the fundamental magnetic constants, i.e., saturation polarization Js(T), magnetostriction constant λs(T), and induced anisotropy Ku(T).