Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)
MA 63.62: Poster
Freitag, 18. März 2011, 11:00–14:00, P2
Ab initio calculations of the magnetic properties of mixed-valence perovskite — •Igor Maznichenko1, Arthur Ernst2, and Ingrid Mertig1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale), Germany
Materials with perovskite and perovskite-like structures demonstrate a broad spectrum of physical properties. Colossal magnetoresistance, ferroelectricity, multiferroicity, superconductivity, charge ordering, metal-insulator transition, Jahn-Teller and other effects are observed in perovskites. These properties of the mentioned materials with the common formula ABO3 are very sensitive to the type of the cations A and B. Manganites La1−xSrxMnO3 are strongly correlated 3d transition-metal oxides with different types of magnetic ordering (depending on the La/Sr ratio).
Here we perform ab initio calculations for the above mentioned manganites in different structural phases. We try to analyze the magnetic properties of mixed-valence mangatines depending on charge ordering in the system.