Electron transport in Pd-Ni alloys with Ni concentration above the critical concentration

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Abstract
The electrical and thermal resistivities and thermopowers of three palladium‐nickel alloys have been measured between 2 and 77 °K. The alloys had nickel concentrations slightly higher than the critical concentration necessary for low temperature ferromagnetism. The electrical resistivity results indicate that both the electron‐electron and electron‐phonon terms change with composition. The electron‐electron term decreases with increasing nickel concentration and has been attributed to nickel‐nickel interactions which decrease the effective enhancement. The greatly reduced electron‐phonon term in two alloys near 3 at% nickel does not seem to be related to a similar reduction in the coefficient of the T3 term in the specific heat. The thermopower has been observed to change character between 3.1 and 4.3 at% nickel. This effect is similar to previous results on Pd‐Ni alloys which are as yet unexplained.