Magnetic Moment of Co–Cu Solid Solutions with 40 to 85% Cu

Abstract

Metastable Co–Cu solid solutions in the concentration range between 12% and 95% Cu were obtained by simultaneous evaporation of Co and Cu on a cold substrate. The spin moment of the as‐deposited alloys is equal to that of Fe–Ni, Co–Ni, Ni–Cu solid solutions with the same average number of electrons per atom. During annealing at 700°C for a suitable time the spin moment increases to the value calculated for the two‐phase equilibrium state of the alloys. For an alloy with 65% Cu the Curie temperature is 580°K. All alloys have fcc structure before and after annealing.