New Heavy-Electron System Ce₃Pd₂₀Si₆

Abstract

Magnetic and transport properties of the ternary compound Ce 3 Pd 20 Si 6 are investigated down to 0.035 K. The temperature dependence of the electrical resistivity indicates that this compound is a new Kondo material. The low-temperature specific heat measurement reveals that C / T is strongly enhanced at low temperatures, reaching as high as 8 J/mole Ce · K 2 at 0.2 K. This leads to the conclusion that Ce 3 Pd 20 Si 6 is one of the heaviest-electron systems.