Inhomogeneity corrections to the ground-state properties of itinerant ferromagnets

A first-principles potential for an itinerant spin-polarized electron gas has allowed a more fundamental study of ground-state properties in itinerant ferromagnets. The contribution of additional terms accounting for the highly inhomogeneous spin-density profile, found in most ferromagnetic materials, is presented. These are evaluated rigorously in the high-density limit, and results are given for arbitrary ratios of spin-up and spin-down densities. Forms are also derived for extending the results to lower spin densities.