Magnetoelectric Neel anisotropies

The applicability of Neel's pair model to metallic 3d surfaces and interfaces is explained in terms of the tight-binding moments-theorem. The Neel model reproduces itinerant magnetism so long as the band structure is approximated by third-moment atomic-pair contributions. This establishes an atomic Neel description of interfaces and impurities. The Neel parameter g depends on the d-band filling and, to some extent, on the atomic structure.