Deviations of Matthiessen's rule in some PdAu alloys

Abstract

The low temperature electrical resistivity of Pd 1−cAu c alloys ( c = 0.1, 0.22, 0.38, 0.69, 0.82 and 1.1 at.%) have been studied in detail between 1.5 and 300 K. Deviations from Matthiessen's rule (DMR) have been analysed on the basis of a two-band model, and the agreement is found to be reasonably good. The parameter λ was found to decrease monotonically with temperature, and no anomalous maximum was observed as with earlier studies of Pd Ti. The variation of β shows a weak temperature dependence. The limitations of the model are also discussed.