Abstract
The temperature dependence of the electrical resistivity of dilute alloys of manganese dissolved in silver was measured in the range 0.3–12 K. These data complement previous work on this alloy system. The Kondo effect contribution to the resistivity was separated from effects arising from impurity-impurity interactions and from scattering by the lattice. Our data are the first to support the d-wave unitarity limit in the free electron approximation : The resistivity due to exchange interaction at 0 K is found to be 9.1 ΜΩ-cm/at % when potential scattering is taken into account. The dependence on impurity concentration of the temperature at which the resistivity is a maximum was compared with Matho and Beal-Monod's theory, but, as predicted by Klein's model, it is still, to a very good approximation, directly proportional to the concentration. This fitting gave a value of the distribution width parameter consistent with the concentration-independent slope of the resistivity at 0 K. A Kondo temperature between 10 and 40 mK is consistent with our results.
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