Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.53: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Spectromicrosopy of Ferroelectric and Magnetoelectric Nanostructures — •Ingo Krug^1,4, Nick Barrett¹, Adrian Petraru², Jean-Baptiste Moussy¹, Bertrand Vilquin³, Hermann Kohlstedt², and Claus M. Schneider⁴ — ¹CEA Saclay, DSM/IRAMIS/SPCSI, Gif-sur-Yvette, FRANCE — ²FZ Jülich, IFF-6, Jülich, GERMANY — ³Ecole Centrale de Lyon — ⁴FZ Jülich, IFF-9, Jülich, GERMANY

We present a spectromicroscopy study (LEEM, XAS- and energy-filtered PEEM) of ferroelectric and magnetoelectric nanostructures written by Piezoforce Microscopy. In thin ferroelectric PbZr_xTi_1−xO₃ (PZT) and BaTiO₃ (BTO) layers, artificial ferroelectric 180^∘ domains have been written by Piezoforce Microscopy. The opposite polarization states in the 180^∘ domains produce strong changes in the surface electronic structure, which have directly been observed as lateral contrast in both threshold PEEM and LEEM in mirror and diffraction mode. Analyzing the energies of emitted/reflected electrons, the changes in the surface potential (workfunction) can be determined, allowing for a quantification of the ferroelectric state. Furthermore we present an energy-filtered PEEM study of nanostructured magnetoelectric BTO/CFO samples grown by MBE.