Galvanomagnetic properties of a molybdenum permalloy

Abstract

The electrical resistivity, Hall effect, and transverse magnetoresistivity of 78-wt.%-Ni, 19-wt.%-Fe, 3-wt.%-Mo alloy were measured from 300° K to above its Curie temperature in fields up to 10 kOe. The results, when analyzed in terms of the existing theories, showed that the spin-disorder scattering gives a dominant contribution to the high-temperature solute resistivity and transverse magnetoresistivity whereas the "side-jump" mechanism is dominant in spontaneous Hall effect at high temperatures. The ordinary Hall coefficient R₀ was found to pass through a sharp maximum around 0.93T_c. The well-known two-current conduction model, though able to duplicate the qualitative features of the temperature dependence observed for the ordinary Hall coefficient below ~ 500° K, was found to be incapable of explaining the strong temperature dependence of R₀ above ~ 500° K.