Spin-disorder scattering in concentrated nickel copper alloys

The electrical resistivities of pure nickel and its alloys containing 9.38, 18.77 and 28.32 at.% copper were measured from 80°K to 920°K. The solute resistivities ?_s(T) =?_alloy(T)-?_host(T)] above 300°K were found to be in excellent agreement with a spin-disorder model which takes into account the different moments on solute and host sites, whereas agreement with well-known Mott band model was not at all satisfactory. Thus, it was concluded that a spin-disorder scattering mechanism is dominant in the high-temperature solute resistivities of nickel copper alloys used in the present investigation.