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 spinpolarized 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.
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Kudrnovský, J., Drchal, V., Turek, I., Bruno, P., Dederichs, P., Weinberger, P. (1999). Ab Initio Theory of the Interlayer Exchange Coupling. In: Dreyssé, H. (eds) Electronic Structure and Physical Properies of Solids. Lecture Notes in Physics, vol 535. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-46437-9_9
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DOI: https://doi.org/10.1007/3-540-46437-9_9
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