Nearest-Neighbor Model of Magnetism for Copper-Nickel Alloys and Clustering of Magnetic Moments

Abstract

We show that the appearance of a localized moment on Ni atoms in the critical range of concentration is accurately described by a simple environment-dependent model of the Jaccarino-Walker type, and that this model implies a "clustering" of magnetic moments, even on the basis of a random distribution of atoms. The fit with experimental data is promising in view of the approximations made.