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Structural and ferroelectric properties of 0.9PMN-0.1PT thin films

: Mietschke, Michael; Engelhardt, Stefan; Fähler, Sebastian; Molin, Christian; Gebhardt, Sylvia; Schultz, Ludwig; Hühne, Ruben


Ferroelectrics 499 (2016), No.1, Special Issue: Proceedings of the Thirteenth European Meeting on Ferroelectricity (EMF-13) Part III, pp.57-63
ISSN: 0015-0193
ISSN: 1563-5112
European Meeting on Ferroelectricity (EMF) <13, 2015, Porto>
Deutsche Forschungsgemeinschaft DFG
SPP 1599; Ferroic Cooling
Conference Paper
Fraunhofer IKTS ()
PMN-PT films; epitaxial growth; perovskite phase; pulsed laser deposition

Epitaxial films are a useful tool to study the interplay between the microstructure and the electrocaloric properties in order to optimize the performance of these materials. Therefore, epitaxial 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 (PMN-PT) films were grown by pulsed laser deposition on (001)-oriented single crystalline SrTiO3 (STO) substrates using an epitaxial La0.7Sr0.3CoO3 buffer as bottom electrode and additional Au top electrodes on the surface of the PMN-PT layer. The main goal of our study was to characterize the influence of the laser fluence on the structural properties. Our data show that pyrochlore-free PMN-PT films can be realized for low fluences. The relative permittivity and the polarization were determined as a function of temperature to verify the ferroelectric quality of our films.