Kondo Effect in an Amorphous ${\mathrm{Ni}}_{41}$${\mathrm{Pd}}_{41}$${\mathrm{B}}_{18}$ Alloy Containing Cr

The results of electrical-resistivity-vs-temperature measurements on an amorphous ${\mathrm{Ni}}_{41}$ ${\mathrm{Pd}}_{41}$ ${\mathrm{B}}_{18}$ alloy containing up to 4-at.% Cr exhibits the characteristics of a Kondo system. The experimental data are used to make a comparison between the Kondo theory and the Hamann theory. It is found that both theories agree very well on the slope of logarithmic temperature dependence of the $s-d$ resistivity. In terms of a universal resistivity curve, the Hamann theory comes to closer agreement with the experimental data in a wider temperature range than does the Kondo theory.