New Heavy-Electron System Ce₃Pd₂₀Si₆

Synthesis and physical properties of a new caged compound Ce3Pd20As6 of the C6Cr23-type structure

“…4(b)). Contrary to the Kondo-lattice behavior in the compounds [6,7] of X=Si and Ge, Ce 3 Pd 20 As 6 shows no Kondo effect, suggesting a relatively weak Kondo screening. The residual resistivity ratio is rather low, which is attributable to the inhomogeneity of atomic composition with variable stoichiometry.…”

“…We have focused on a series of ternary compounds of Ce-Pd-X (X=Si, Ge and P) with the C 6 Cr 23 -type structure [6,7,8,9,10,11,12,13,14,15,16], because this system provides a unique opportunity of systematic investigation of multipolar effects. These compounds have two crystallographicallyinequivalent Ce-sites of the 4a (O h symmetry) and 8c (T d symmetry) sites.…”

“…The CEF ground states of the compounds of X=Si and Ge are the Γ 8 states at both Ce sites [7,10,17], which contribute to the quadrupolar and magnetic orderings. Each compound (X=Si or Ge) shows the coexistence of the Kondo-lattice behavior and ordered states [6,7,10,11]. On the other hand, the different CEF ground state at either 4a or 8c site is possibly realized in the phosphide with atomic disorder at the 4a site, where the Ce atoms are partially replaced with Pd 3 atoms [16].…”

Modern Aspects of Bulk Crystal and Thin Film Preparation

“…The recent observation of magnetic-field induced quantum criticality [Paschen et al (2007); Strydom et al (2006)] in the cubic heavy fermion compound Ce 3 Pd 20 Si 6 [Takeda et al (1995)] has attracted considerable attention. Ce 3 Pd 20 Si 6 crystallizes in a cubic Cr 23 C 6 -type structure with the space group Fm3m [Gribanov et al (1994)].…”

“…Ce 3 Pd 20 Si 6 crystallizes in a cubic Cr 23 C 6 -type structure with the space group Fm3m [Gribanov et al (1994)]. The cubic cell with a= 12.161 Å [Gribanov et al (1994)]; 12.280 Å [Takeda et al (1995)] contains 116 atoms. The Ce atoms occupy two distinct sites of cubic point symmetry.…”