Origin of Anomalous Resistivity in Ni–Cu Alloys

Abstract

The electrical resistivity of Ni-Cu alloys has been measured in the temperature range from 4.2 to 1100 K. By using the numbers of conduction electrons and hole-carriers estimated in this study, the anomalous magnetic resistivity in ferromagnetic Ni-Cu alloys, which has a maximum around 25 at %Cu notwithstanding the linear decrease of magnetization or Curie temperature with increasing Cu content, is explained as a result of the coexistence of scattering processes of spin disorder and s-d transitions. The anomalous variation of the residual resistivity. with concentration in Ni-Cu alloys is due mainly to the magnetic clusters, which have the maximum influence at the critical concentration for ferromagnetism.

Investigation of the microhardness and the electrical resistivity of undercooled Ni–10 at.% Si alloys

“…With increasing temperature from 298 K to 770 K, resistivity of pure Ni increases from 7.58 × 10 − 8 Ω m to 29.4 × 10 − 8 Ω m. These values are close to the resistivity values (7.53 × 10 − 8 Ω m-33.2 × 10 − 8 Ω m) obtained by Ikeda et al [21] at the same temperature range. It can be seen in Fig.…”

Influences of high temperature on the microstructural, electrical and mechanical properties of Ni-23 wt.% Al alloy

“…As can be seen from Fig. 6, the electrical resistivity values are between 8.85 -45.86 · 10 -8 X m. These are close to the resistivity values 7.53 -33.2 · 10 -8 X m and 7.58 -29.4 · 10 -8 X m obtained by Ikeda et al [35] and Çadırlı [36], respectively. the evaluation of the alloy design, so characterization of these properties is needed.…”

Hole Carriers and Electrical Resistivity in Ferromagnetic Ni-base Alloys

“…The total magnetic resistivity at T>Tc is thus expressed by found in Ni-Cu alloys (12). This suggests that the transition probability from the s-band to the d-band is proportional to nh.…”