ac susceptibility and electrical resistivity of some dilute Pd Mn alloys

Abstract

The ac susceptibility and electrical resistivity of several dilute Pd Mn alloys containing between 0.5 and 2.5 at. % Mn have been measured. The ac susceptibility, taken in various collinear biasing fields, exhibits a peak close to, but above, the Curie temperature T_c. If it is assumed that the behaviour of the magnetization in the critical region close to T_c is governed by the scaling law equation of state, then the occurrence of such peaks follows directly. Such an approach also predicts a temperature and field dependent variation for such peaks which we have attempted to verify. The latter then lead us to estimates for the critical indices δ and γ for this system.