Dresden 2006 – wissenschaftliches Programm

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.32: Poster

Dienstag, 28. März 2006, 15:15–19:15, P1

Magnetism and interlayer exchange coupling in Kondo-lattice films — •Jochen Kienert and Wolfgang Nolting — Humboldt-Universität zu Berlin*Institut für Physik*Theoretische Festkörperphysik*Newtonstraße 15*D-12489 Berlin

We propose a theory for layered structures consisting of localized moments interacting with free charge carriers (Kondo-lattice model). By using an extension of the well-known RKKY-interaction we can evaluate magnetic properties as well as the charge excitation spectrum self-consistently. Typical features of the double exchange, i.e. strong Hund coupling, are recovered by our theory. The role of anisotropy and charge transfer, which have to be taken into account in dimensionally reduced systems, have also been investigated. We present results on the temperature dependence of the interlayer exchange coupling between Kondo lattice layers separated by a non-magnetic spacer.