Magnetoresistance of the giant moment system PdMn

The longitudinal magnetoresistance of a Pd-0.15 at.% Mn alloy has been measured in various fixed fields between 1.5 and 10K. Within experimental error the magnetic scattering component can be expressed as a unique function of H/T over the entire field and temperature range examined. These data are well fitted using an expression calculated from a simple s-d model in the first Born approximation provided an enhanced (but well defined) value for both the g factor (geff=2.44) and the effective spin (Seff=3.0(2)) are used. These fitting parameters are consistent with other data. An enhancement of the g factor via the local moment-d band exchange coupling yields a value of geff=2.22, somewhat less than that found experimentally.