Electrical resistivity measurements on dilute alloys of Nico, Niv, Nipt And Nia1

Abstract

Electrical resistivi~ measurements have been made on Ni, Ni-5 at% Co, Ni-5 at% V, Ni-5 at% Pt and Ni-5 at% Al in the temperature range from 20 °c to at least 70 °c above the Curie temperatures of the alloys. For T > Tc the temperature coefficients of resistivity of Ni as well as of the ~Co and NiPt alloys showed a logarithmic divergence whereas the NiV and NiAl alloys showed no such logarithmic divergence. For T < Tc none of the resistivity coefficients showed a logaritmic divergence. The additional resistivity caused by alloying Ni with the different solutes shows a quadratic relationship (of the same kind as Linde~s rule) to a quantity which may be interpreted as the effective valence difference between the solvent (Ni) and the solute