Microscopic Magnetic Properties of Fe-V Metallic Superlattice Investigated from 51V NMR

A 51V NMR investigation has been made on the magnetic properties, particularly the interface magnetism, of an Fe-V metallic superlattice. Three kinds of signals have been observed; the two kinds associated with the atomic layers having induced V magnetic moments at the interface region, and the other with the nearly nonmagnetic sites in the more distant V layers. From the distribution of the hyperfine field, it is concluded that the interface atomic layer is the mixture of Fe(50 %)-V(50 %) atomic concentration with a positive atomic short range order, and that the compositional modulation is restricted to three atomic layers at the interface. It is also found that the hyperfine field at the nearly nonmagnetic sites has an anisotropy which can not be expected in random alloys.