Equation of State from a Phenomenological Model for the Kondo System La:Ce

Abstract

Data on the temperature and field dependence of the susceptibility of La:Ce alloys are presented for temperatures $T>~0.6$\ifmmode^\circ\else\textdegree\fi{}K and fields up to 50 kG. The data show that the susceptibility $\ensuremath{\chi}=cF(T,H)$, where $F$ is nearly independent of the concentration $c$. A phenomenological model predicts a susceptibility which agrees with the experimental $F(T,H)$.