Free-Energy Shift of Conduction Electrons Due to thes−dExchange Interaction

Abstract

A free-energy shift of the conduction electrons due to magnetic impurity immersed into an otherwise pure metal is calculated up to the fourth order in the $s-d$ exchange interaction. The results obtained show that there appears no anomalous term of the form $T^n\ln T$ up to this order in the magnetic-field-independent part of the free energy and that anomalous $\ln T$ terms are included only in the magnetic-field-dependent part.