Ab initio theory of the interlayer exchange coupling
Abstract
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.
Cite
@article{arxiv.cond-mat/9811152,
title = {Ab initio theory of the interlayer exchange coupling},
author = {Josef Kudrnovsky and Vaclav Drchal and Ilja Turek and Patrick Bruno and Peter Dederichs and Peter Weinberger},
journal= {arXiv preprint arXiv:cond-mat/9811152},
year = {2007}
}
Comments
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/