The electrical resistivities $\rho$ of amorphous metallic spin-glass alloys (${\mathrm{Fe}}_x{\mathrm{Ni}}_{80-x}{\mathrm{P}}_{14}{\mathrm{B}}_6$) indicate that the relative importance of the collective versus individual aspects of the spin-freezing phenomenon are not the same in the transport properties of metallic amorphous systems as in crystalline spin-glasses. The observed negative magnetoresistance and the concentration dependence of the low-temperature behavior of $\rho$ are indicative of a contribution of magnetic origin which, however, cannot be adequately explained on the basis of current theories.

• Received 10 December 1979

DOI:https://doi.org/10.1103/PhysRevB.22.3374