Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering