Toward Simple Powers of T in the Kondo Effect?

Abstract

Experimental evidence is presented which strongly suggests that simple power laws govern the temperature dependence of ground‐state properties of dilute magnetic alloys exhibiting the Kondo effect. The systems Cu–Fe, Au–V, Pd–Cr, and Pt–Cr are discussed to show that in most cases the impurity specific heat ΔC∝T and the temperature‐dependent part of the electrical resistivity Δρ∝−T², provided the concentration of impurities is low enough. If this concentration is increased above some critical value, the temperature dependences become more complicated.