1998/11/30 by Josef Kudrnovsky, Vaclav Drchal, Ilja Turek +3
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.mtrl-sci
published as "Electronic Structure and Physical Properties of Solids. The Uses of the LMTO Method", edited by Hugues Dreysse (Springer Verlag, Berlin, 2000), pp. 313-346 · 34 pages, LaTeX2e, Springer-Verlag style (style files included), 7 figures. Talk given at the "Workshop on the TB-LMTO Method", Mont-Sainte-Odile, France, October 1998. v2: ref. added. Further (p)reprints available from http://www.mpi-halle.de/~theory/
arxiv created 2000/07/27 · arxiv updated 2009/11/30
Ab initio formulations of the interlayer exchange coupling (IEC) between two, in general non-collinearly aligned magnetic slabs embedded in a non-magnetic spacer are reviewed whereby both the spacer and the magnetic slabs as well as their interfaces may be either ideal or random. These formulations are based on the spin-polarized surface Green function technique within the tight-binding linear muffin-tin orbital method, the Lloyd formulation of the IEC, and the coherent potential approximation using the vertex-cancellation theorem. We also present an effective method for the study of the temperature dependence of the IEC. The periods, amplitudes, and phases are studied in terms of discrete Fourier transformations, the asymptotic behavior of the IEC is briefly discussed within the stationary-phase method. Numerical results illustrating the theory are presented.