Electrical Resistivity and Screening in Some Dilute Ferromagnetic Nickel Alloys

By observing departures from Matthiessen's rule, the electrical resistivity for each spin direction in dilute ferromagnetic $\mathrm{Ni}$-Co and $\mathrm{Ni}$-Fe alloys has been obtained. A phase-shift calculation for the majority spin carriers was performed to determine the parameters of a square-well potential assumed to represent the impurity center. From the potentials, values of the characteristic thermopower and the changes in the electronic specific heat, on alloying, for these electrons have been obtained.