Abstract
Our investigation of ${\mathrm{Ce}}_{2}{\mathrm{Ni}}_{3}{\mathrm{Ge}}_{5}$ by means of transport, specific heat and magnetization measurements shows that the compound is a Kondo lattice system exhibiting two antiferromagnetic transitions at ${T}_{N1}=5.1\mathrm{K}$ and ${T}_{N2}=4.5\mathrm{K}.$ An analysis of the transport and specific heat data suggests that the Kondo energy scale ${k}_{B}{T}_{K}$ is of the order of ${k}_{B}{T}_{N}.$ The resistivity and heat capacity data below 4 K are suggestive of the appearance of a spin-wave gap. The compound exhibits giant magnetoresistance at low temperature. The crystal field splitting is estimated to be about 180 K.
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