Frequency and magnetic field dependences of coercivity and core loss in Fe–Mo–Si–P–C–B amorphous alloys

Relations of the coercivity (Hc) and core loss (P) with the frequency (f) as well as the magnetic field (H0) or the maximum induction (Bm) of Fe–Mo–Si–P–C–B amorphous alloys were investigated. The coercivities and core losses of the Fe-based amorphous alloys were determined by the measurements of dynamic magnetization curves, as functions of frequency (f = 50–1000 Hz) and amplitude (H0 = 0–600 A/m) of applied field. The coercivities and core losses were fitted by a power law dependence of the frequency and amplitude of applied field as well as the maximum induction respectively. The results indicated that the coercivity and core loss of the Fe-based amorphous alloys significantly depended on the frequency and magnetic field (induction) as well as intrinsic parameters.