Abstract
Amorphous rare earth (RE)-Al (RE=La, Ce, Pr, SM Gd, Tb, Dy, Ho and Er) ribbons have been prepared by a melt-quenching technique. The formation regions of these amorphous alloys are in almost same composition about from 40 to 80 % RE and their crystallization temperature are correlated to the liquidus temperature Tliqmix of the alloys. In the case of amorphous Gd60Al40 alloy, the relaxation of remanence has been found and the coercive force shows remarkably increase below 20 K in the same way as those of amorphous Fe-Zr alloys. The electrical resistivity of amorphous Gd50Al50 alloy decreases monotonically with increasing temperature and varies linearly as a function of ZnT in a relatively high temperature range. Other high Gd content amorphous alloys and amorphous Tb-Al alloys show a broad anomaly around the Curie temperature in the electrical resistivity-temperature curves.
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