Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: POSTER Ia

MA 19.62: Poster

Dienstag, 17. März 2015, 09:30–13:00, Poster A

New magnetic phase in LaMnO₃/SrMnO₃ superlattices on SrTiO₃ (001) substrate — •Danny Schwarzbach, Markus Jungbauer, Sebastian Hühn, Markus Michelmann, and Vasily Moshnyaga — I. Physikalisches Institut, Georg-August-Universität Göttingen

Interface effects in perovskite oxide heterostructures have proven to result in interesting novel magnetic phenomena. We studied (LaMnO₃)_{2ML· n}/(SrMnO₃)_{1ML· n} superlattices of n≈ 3 grown on SrTiO₃ substrates with (001) orientation by Metalorganic Aerosol Depistion (MAD) technique. These samples exhibit two ferromagnetic phases: the low T_C phase with T_C≈ 270 K is likely originated from LMO and has already been observed by other groups. We also detected high temperature FM phase with T_C≈ 355 K. The high T_C phase reveals a strong uniaxial in plane anisotropy, with easy axis aligned parallel to the monoatomic crystal steps of the substrate. The low temperature saturation magnetization of this phase corresponds to a fully saturated Mn monolayer, indicating a two-dimensional nature of high-T_C ferromagnetic phase.
Support by the Seventh Framework Programme of the EU is acknowledged.