Abstract
Magnetoresistivity measurements are performed in fields up to 40 kOe on some concentrated amorphous La--Gd--Au alloys exhibiting characteristics of a spin-glass. The negative magnetoresistivity at low temperature is found to be roughly proportional to the square of the magnetization. The resistivity minima in these alloys are attributed to a mechanism of electron scattering from magnetic clouds coupled by the RKKY interactions, in qualitative agreement with analysis of remanent magnetization data. 4 figures, 1 table.
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