High magnetic permeability in Ni-Fe-Cu-Mo alloys

Abstract

Earlier work showed that some low-field magnetic properties of high-permeability Ni-Fe alloys containing about 80-percent Ni could be explained by considering the effect of the filling of the 3d vacancies of the Ni atoms by the outermost electrons of an added nonferromagnetic element. This work is extended to show how the copper content of some Ni-Fe-Cu-Mo alloys, by influencing their ordering behavior, affects the heat treatment required to give high permeability.