Abstract
We have measured the static magnetic susceptibility $\ensuremath{\chi}$ of the compound $\mathrm{Ce}{({\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Ag}}_{x})}_{6}$ for $x\ensuremath{\le}0.1$ from 2.4 to 300 K and the specific heat of one sample ($x=0.1$) from 0.6 to 30 K. The effect of Ag substitution is to markedly increase both $\ensuremath{\chi}$ and the Sommerfeld constant $\ensuremath{\gamma}$ at low temperatures. $\ensuremath{\gamma}$ for the $x=0.1$ sample is temperature dependent and reaches the value 2.1 J/mole ${\mathrm{K}}^{2}$ at 0.6 K, extrapolating to approximately 2.8 J/mole ${\mathrm{K}}^{2}$ at $T=0$ K. These results can be analyzed in terms of a twofold decrease in the value of the Kondo temperature ${T}_{K}$ with 10% Ag substitution.
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