MAGNETIC SHORT-RANGE ORDER IN TBX SI1-X (0.18 LESS-THAN-OR-EQUAL-TO X LESS-THAN-OR-EQUAL-TO 0.87) AMORPHOUS-ALLOYS

We report the results of neutron diffraction measurements performed at low temperature on Tb(x)Si1-x amorphous alloys. We show that for RE-rich alloys the magnetization between first nearest neighbours is large, the dispersion between moments relatively small (35-degrees), and for a volume containing three or four shells of terbium atoms the magnetization is about half the full moment. This asperomagnetic order is practically independent of the terbium concentration. For x = 0.18 the intensities are much weaker and the magnetic order cannot be quantitatively determined. Only a speromagnetic character can be suggested.