Abstract

${\mathrm{CeNiGe}}_{3},$ crystallizing in the orthorhombic ${\mathrm{SmNiGe}}_{3}$-type crystal structure, was studied by means of dc and ac magnetic susceptibility, magnetization, electrical resistivity, magnetoresistivity, Hall effect, and specific-heat measurements. The compound orders antiferromagnetically at ${T}_{\mathrm{N}}=5.5\mathrm{K}$ due to the presence of well localized $4f$ magnetic moments, which are partly screened via a Kondo-like mechanism. The electrical behavior is governed by an interplay of Ruderman-Kittel-Kasuya-Yosida and Kondo interactions modified by crystal-field effects. The Kondo temperature is of similar magnitude as ${T}_{\mathrm{N}},$ and the overall crystal electric field splitting is of the order of 160 K. The low-temperature specific heat exhibits some enhancement indicating the formation of moderate-heavy quasiparticles in the antiferromagnetic state. The specific variation with applied magnetic field of the main physical characteristics of ${\mathrm{CeNiGe}}_{3}$ points at a complex magnetic structure of the compound in the ordered region.

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