The combined effect of temperature and disorder on interlayer exchange coupling in magnetic multilayers
Vaclav Drchal, Josef Kudrnovsky, Patrick Bruno, Peter Dederichs, Peter Weinberger
Abstract
We study the combined effect of temperature and disorder in the spacer on the interlayer exchange coupling. The temperature dependence is treated on ab initio level. We employ the spin-polarized surface Green function technique within the tight-binding linear muffin-tin orbital method and the Lloyd formulation of the IEC. The integrals involving the Fermi-Dirac distribution are calculated using an efficient method based on representation of integrands by a sum of complex exponentials. Application is made to Co/Cu100-xMx/Co(001) trilayers (M=Zn, Au, and Ni) with varying thicknesses of the spacer.
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