Magnetic excitation in Co-based amorphous ferromagnets

The temperature dependence of zero-field spontaneous magnetization of amorphous Co/sub x/Si/sub 5/B/sub 95-x/ (x=70, 74, 78) alloys is investigated. The saturation magnetization is determined by linear extrapolation of the magnetization as a function of the internal magnetic field in the temperature range 4.2 K>