Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.27: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
First-principles study of magnetic perovskite interfaces — •Igor Maznichenko1, Arthur Ernst2, and Ingrid Mertig1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
Materials with perovskite structure 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. La2/3Sr1/3MnO3 (LSMO) is a strongly correlated 3d transition metal oxide with a Curie temperature (TC) above RT (370 K). For other La/Sr ratios different types of antiferromagnetism are observed. Another perovskite - ruthenate, SrRuO3 (SRO) is a 4d ferromagnet with TC = 160 K. Two component perovskite superlattices have two different terminations due to the asymmetry AO/BO2. In particular in LSMO/SRO superlattices this can be treated as a function of the Sr amount at one of interfacial LSMO layer. Using a first-principles Green function method within density functional theory, we examinate magnetic coupling at different interfaces.