Abstract
The electrical resistivity and magnetization of Ni-base alloys containing Zn up to 25 at% were respectively measured between 4.2 and 1000 K and at 77 K. With increasing Zn content, the magnetic contribution to the resistivity slightly increases and has a broad maximum at 8–16 at% Zn, notwithstanding the linear decrease of the magnetization or Curie temperature. This anomalous composition dependence of the magnetic resistivity in ferromagnetic Ni–Zn alloys is explained as a result of the coexistence of scattering processes of spin disorder and s−d transition, as previously reported in the Ni–Cu and Ni–Co alloys. It is pointed out that the hole-carrier, which is observed in the ordinary Hall effect or the resistivity due to the phonon scattering, behaves as the probability of interband s−d transition in the magnetic resistivity.
