Magnetism and Kondo effect in ${\mathrm{CePd}}_2$${\mathrm{Si}}_{2\mathrm{-}\mathit{x}}$${\mathrm{Ge}}_{\mathit{x}}$

We report the results of electrical-resistivity measurements in the temperature interval 1.5–300 K on the pseudoternary system ${\mathrm{CePd}}_2$${\mathrm{Si}}_{2\mathrm{-}\mathit{x}}$${\mathrm{Ge}}_{\mathit{x}}$. Replacement of Si by Ge results in a decrease of the Néel temperature as well as of the Kondo temperature. This observation supports an earlier conclusion that ${\mathrm{CePd}}_2$${\mathrm{Si}}_2$ is situated at the peak of Doniach’s magnetic phase diagram. This study establishes that ${\mathrm{CePd}}_2$${\mathrm{Ge}}_2$ is an antiferromagnetic Kondo lattice.