Dresden 2011 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.61: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Piezoresponse force measurements on hetero-epitaxially grown Sodium-Bismuth-Titanate (NBT) thin films deposited by MOCVD-technique — •Andreas Duk, Jutta Schwarzkopf, Günter Wagner, Saud Bin Anooz, and Roberto Fornari — Institute for Crystal Growth, Berlin, Germany

Epitaxially grown Sodium-Bismuth-Titanate (NBT) thin films deposited by the MOCVD-technique on SrTiO3, NdGaO3 and DyScO3 were investigated by local piezoresponse force measurements. Aurivillius phases with m = 3, m= 3.5 and m = 4 and the Na0.5Bi0.5TiO3 perovskite phase were realized by varying the substrate temperature and/or the Na/Bi ratio in the gas phase. It has been observed that the effective piezoelectric coefficient increases with increasing number of perovskite units between two (Bi2O2)2+ intermediate layers. The influence of the lattice strain in the films on the piezoelectric response and the ferroelectric properties were studied by using different oxide substrates and films with variable film thickness.