Abstract
The magnetization and Curie temperature of rapidly quenched (Gd 0.7 M 0.3 ) 80 Si 12 B 2 (M=Y, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Al) amorphous alloys were investigated. The Curie temperatures of alloys with M=Mn, Fe are higher by about 70K and 120K than that of Gd 80 Si 12 B 8 amorphous alloy. The magnetic moments of Mn, Fe and Co atoms are 2,1 and 1? B respectively. These magnetic moments are antiparallel to that of the Gd atoms. The magnetic moment of Ni atoms nearly disappears; the magnetic moments of Y and V atoms are 1.7 and 2.1? B respectively. The magnetic moment of Y atoms is antiparallel to that of Gd atoms, while that of V atoms is parallel to the latter. We conclude that alloys with nonmagnetic elements M exhibit asperomagnetism in which the Gd moments are distributed, while alloys with magnetic elements M have a ferrimagnetic order.
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