HALL EFFECT MAGNETIC RESISTIVITY AND MAGNETIC SUSCEPTIBILITY OF NICKEL AND NICKEL-COPPER ALLOYS

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 Rp 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 Rp. A linear relationship between Rpi, the impurity part of the paramagnetic Hall coefficient, and ρmi, the impurity part of the magnetic resistivity, with a constant of proportionality 4.5 × 10-5 G-1, has been observed in alloys. © 1969 The American Physical Society.