Kondo effect in CexLa1-xCu2.05Si2 intermetallics - art. no. 184438

The magnetic susceptibility and susceptibility anisotropy of the quasibinar y alloy system CexLa1-xCu2.05Si2 have been studied for low concentration of Cc ions. The single-ion description is found to be valid for x less than o r equal to0.09. The experimental results are discussed in terms of the dege nerate Coqblin-Schrieffer model with a crystalline electric field splitting Delta similar or equal to 330 K. The properties of the model, obtained by combining the lowest-order scaling and the perturbation theory, provide a s atisfactory description of the experimental data down to 30 K. The experime ntal results between 20 K and 2 K are explained by the exact solution of th e Kondo model for an effective doublet.