title: The ground state phase diagram of the diluted ferromagnetic Kondo-lattice model.
abstract: We investigate the existence of several (anti-)ferromagnetic phases in the diluted ferromagnetic Kondo-lattice model, i.e. ferromagnetic coupling of local moment and electron spin. To do this we use a coherent potential approximation (CPA) with a dynamical alloy analogy. For the CPA we need effective potentials, which we obtain first from a mean-field approximation. To improve this treatment we use in the next step a more appropriate moment conserving decoupling approach and compare the two methods. The different magnetic phases are modeled by defining two magnetic sub-lattices. As a result we present zero-temperature phase diagrams according to the important model parameters and different dilutions.
authors.affiliation: Lehrstuhl Festkörpertheorie, Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany. stier@physik.hu-berlin.de
authors.forename: M
authors.initials: M
authors.lastname: Stier
authors.forename: S
authors.initials: S
authors.lastname: Henning
authors.forename: W
authors.initials: W
authors.lastname: Nolting