The ground state phase diagram of the diluted ferromagnetic Kondo-lattice model
arXiv:1106.0181 · doi:10.1088/0953-8984/23/27/276006
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 get 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 both methods. The different magnetic phases are modelled by defining two magnetic sublattices. As a result we present zero-temperature phase diagrams according to the important model parameters and different dilutions.
arXiv commentaccepted for publication in Journal of Physics: Condensed Matter
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