High-Field Magnetoresistance in Nickel Single Crystals

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Abstract
Measurements of transverse and longitudinal magnetoresistance in pure single crystals of nickel are reported. In the samples studied both the longitudinal and the transverse magnetoresistance tend to saturation at high fields and the transverse magnetoresistance is quite isotropic. Comparison of these data with that of other workers shows that Kohler's rule is not obeyed in nickel and indicates that the observed tendency to saturation and lack of gross anisotropy are not characteristic of the Fermi surface topology in nickel. It is suggested that impurity scattering mechanisms peculiar to ferromagnetic metals play a major role in determining the characteristics of the magnetoresistance even at the threshold of the high-field region.