Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 19: Poster 2

DF 19.5: Poster

Mittwoch, 13. März 2013, 15:00–17:30, Poster B2

Tunable ferroelectric imprint and Mn valency in PbTiO₃ /La_0.7Sr_0.3MnO₃ nanostructures — •Ingo Krug¹, Ionela Vrejoiu^2,3, Alessio Morelli², Florian Nickel¹, Daniel Gottlob¹, Hatice Doganay¹, Robert Laskowski⁴, Nick Barrett⁵, Jiale Wang⁵, and Claus M. Schneider^1,6,7 — ¹Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, DE-52425 Jülich, Germany — ²Max Planck Institut für Mikrostrukturphysik, DE-06120 Halle, Germany — ³Max Planck Institute of Solid State Physics, DE-70569 Stuttgart, Germany — ⁴Institute of Materials Chemistry, Vienna University of Technology, A-1060 Vienna, Austria — ⁵CEA, DSM/IRAMIS/SPCSI/LENSIS, Bâtiment 462, F-91191, Gif-sur-Yvette cedex, France — ⁶JARA Jülich-Aachen Research Alliance, Forschungszentrum Jülich, DE-52425 Jülich — ⁷Fakultät für Physik and Center for Nanointegration Duisburg-Essen (CeNIDE), DE-47048 Duisburg, Germany

In PbTiO₃ / La_0.7Sr_0.3MnO₃ nanostructure arrays we confirmed a self-organizing pattern consisting of out-of plane 180^∘ ferroelectric domains. The pattern was observed in Piezo-Force microscopy (PFM) as well as X-ray absorption spectroscopy (XAS) and threshold photoemission (TPES) using X-ray Photoemission Electron Microscopy (XPEEM). As found by PFM and XAS, the pattern correlates with the LSMO thickness as well as with the Mn valency state, indicating an electronic reconstruction at the interface. The observed effects could provide new ways of constructing multiferroic or magnetoelectric devices tuning the LSMO magnetism.