Theory of the effect of impurities on the a-y transition in cerium

Abstract

The Ramirez-Falicov model for the a-y transition in the Ce-rare earths dilute alloys. Changes in the transition temperatures and pressures predicted by the model, are in good agreement with existing experiments. The most important effect of the impurities is to lower the transition temperature, the effect being more marked for divalent impurities, the assumption that in this way an ordering (Néel) temperature can be reached, leads to the prediction of a phase diagram for these alloys similar to that found for Cr doped V2O3.