Electronic transport properties of R_xY_1-xNi₅Ge₃ (R = Ce, Yb) with R elements in Kondo state

Chem. Met. Alloys 2 (2009) 151-156

https://doi.org/10.30970/cma2.0104

Galyna KOTERLYN, Bogdan MOROKHIVSKII, Mykhaylo KOTERLYN, Roman GLADYSHEVSKII

The results of an investigation of electrical resistivity ρ and thermoelectric power S are presented for the solid solutions Ce_xY_1-xNi₅Ge₃ (x ≤ 0.5) and Yb_xY_1-xNi₅Ge₃ (x = 0, 0.5, 1) in the temperature range 4-400 K. The overall shape of the ρ(T) and S(T) dependences observed for the Ce- and Yb-containing alloys is typical for paramagnetic intermetallics exhibiting a combined effect of Kondo and crystal field (CF) interactions with a low single-ion Kondo temperature T_K, which is generally much lower than the overall CF splitting. The single-ion Kondo interaction does not vary when the Y sublattice is diluted with Ce (T_K ~ 60-80 K). For the Yb-containing alloy, the dependences typical for a Kondo-impurity ground state with T_K < 5 K were observed.

Electrical resistivity of R_xY_1-xNi₅Ge₃ (R = Ce, Yb) as a function of temperature.

Keywords

Rare earth compounds / Electronic transport / Kondo effects / Crystal fields