Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 21: Multiferroics II (jointly with DF, DS, KR, TT)
MA 21.2: Vortrag
Mittwoch, 2. April 2014, 09:45–10:00, HSZ 04
First-principles study of the BaTiO3/BaFeO3 perovskite interface — •Igor Maznichenko1, Sergey Ostanin2, 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
Epitaxial growth can combine a robust ferroelectric, such as BaTiO3, and strong ferromagnets into the so called composite multiferroic films. The switching properties of artificial multiferroics sandwiched between metallic contacts make them excellent candidates for the room temperature four-state memories.
Regarding the ferromagnetic side of composite multiferroics, we suggest to use the cubic perovskite BaFeO3 whose epitaxial growth has been recently reported. Here, from the basis of ab-initio electronic structure calculations, within the Korringa-Kohn-Rostoker method, we study the magnetic properties of bulk BaFeO3. The approach allows us to accurately monitor the evolution of the Curie temperature upon both the tetragonal distortions and presence of oxygen vacancies. Finally, we examine magnetoelectricity at the BaTiO3/BaFeO3 interface.