Hall-effect, electrical-resistivity, and magnetic-susceptibility measurements have been made on polycrystalline specimens of nickel-copper alloys. The temperature range covered is 100 to 700°K. The spontaneous Hall coefficient $R_p$ in the paramagnetic region has been separated out by simultaneous measurement of the Hall resistivity per unit field and the atomic susceptibility. The magnetic resistivity of the same specimen has also been determined. It has been shown that, for pure nickel, intrinsic spin-orbit interaction provides the right order of magnitude of the spontaneous Hall coefficient $R_p$. A linear relationship between $R_{\mathrm{pi}}$, the impurity part of the paramagnetic Hall coefficient, and ${\rho }_{\mathrm{mi}}$, the impurity part of the magnetic resistivity, with a constant of proportionality 4.5 × ${10}^{-5\mathrm{}}$ ${\mathrm{G}}^{-1\mathrm{}}$, has been observed in alloys.

• Received 5 February 1968

DOI:https://doi.org/10.1103/PhysRev.177.1133