Model of surface magnetostriction in nanostructured materials

A theoretical model describing the surface magnetoelastic properties ('surf ace magnetostriction') in nanocrystalline materials is proposed. The model is based on the magnetic dipole-dipole interactions. The nonuniform medium consisting of perfect spherical crystalline grains in a magnetic environmen t of two structures (amorphous and crystalline) is considered. The calculat ions are limited to simple ferromagnets of high symmetry such as body cente red cubic (BCC) and face centered cubic (FCC) crystals. (C) 1999 Elsevier S cience B.V. All rights reserved.