Abstract
The magnetic properties of amorphous Co100-xYx (50 ≤ x ≤ 70) alloys prepared by melt-quenching method were studied. Based on the results derived from the Co-Y alloys, the magnetic moment of Co and the Curie temperature in amorphous Co100-xRx (R=Pr, Nd, Sm, Gd, Dy, Er) alloys were discussed. The Co atoms no longer sustain a moment when x ≥ 60. The exchange integral between R and R or R and Co atoms rapidly decreases as the atomic number of lanthanides increases.
