Bulk magnetic properties of the amorphous alloys RE50Ag50(Re = Gd, Tb, Dy, Ho, and Er)

The initial susceptibility and magnetization as a function of applied field and temperatures have been measured for the amorphous alloys RE50Ag50(RE=Gd, Tb, Dy, Ho, and Er). These have been supplemented by measurement of the time dependence of magnetization. All these alloys exhibit a spontaneous magnetization at low temperatures. An order of magnitude for the magnetic anisotropy has been determined from the experimental data. The diverse phenomena responsible for magnetic ordering and the magnetic after-effect are analysed and discussed.