AB-INITIO THEORY OF MAGNETIC COUPLING OF INTERFACES

A theory of interface-interface interactions in metallic magnetic mult ilayers is developed which takes into account two-dimensional translat ional symmetry via a surface Green's function technique within the tig ht-binding linear muffin-tin orbital method. This new approach is appl ied to different geometrical arrangements, namely to the cases of two Co(001) monolayers in a bulk Cu spacer, and to a Cu spacer between two Co(001) semi-infinite slabs. The pronounced suppression of the long p eriod oscillations was found in the latter case.