Dresden 2014 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 18: Dielectric and ferroelectric thin films
DF 18.4: Vortrag
Mittwoch, 2. April 2014, 17:00–17:20, GER 37
Multilayer Thin Films of Ferroelectric VDF-TrFE Copolymer Characterized by Dielectric Nonlinearities — •Danny von Nordheim1, Andreas Austin1, K.H. Chew2, and Bernd Ploss1 — 1Department of SciTec, University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07745 Jena, Germany — 2Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia
Multilayer ferroelectric structures consist of two or more layers, usually thin films, with at least one of them exhibiting ferroelectric properties. Ceramic multilayers and superlatticess have attracted immense attention during the last years due to their unique behaviour and potential applications namely data and energy storage. Organic materials provide a nontoxic, easily processable alternative. As a model system a stack of two ferroelectric P(VDF-TrFE) thin films with a composition of 56/44 mol% and 70/30 mol% and a thicknesses of approx. 200 nm each has been deposited on a glass substrate covered with aluminium electrodes. The single layers and the multilayer have been characterized regarding their nonlinear dielectric properties at different temperatures. The results have been evaluated with reference to phase transitions and remanent polarisation.