Title :
Influence of the deposition geometry on structural and ferroelectric properties of epitaxial PMN-PT films
Author :
Mietschke, Michael ; Fahler, S. ; Schultz, Ludwig ; Huhne, Ruben
Author_Institution :
Inst. for Metallic Mater., IFW Dresden, Dresden, Germany
Abstract :
Ferroelectric 0.68Pb(Mg1/3Nb2/3)3-0.32PbTiO3 (PMN-PT) films were prepared on La0.7Sr0.3CoO3 (LSCO) buffered SrTiO3(STO) substrates by pulsed laser deposition (PLD). The influence of different deposition geometries on the structural and ferroelectric properties of the grown PMN-PT films was studied. Whereas an epitaxial growth was observed in a wide temperature range, most of the films showed a secondary phase with a pyrochlore structure in addition to the desired perovskite phase. As a result, high leakage currents were measured in these films due to the secondary phase. A pure perovskite phase growth with promising ferroelectric properties were obtained in PMN-PT PT/LSCO/STO film architectures deposited by on-axis PLD below 600°C. The peak split of the PMN-PT (00ℓ) reflections indicate the coexistence of different structures in these layers.
Keywords :
epitaxial layers; ferroelectric ceramics; ferroelectric thin films; ferroelectricity; lead compounds; leakage currents; pulsed laser deposition; vapour phase epitaxial growth; La0.7Sr0.3CoO3-SrTiO3; PLD; PMN-PT (00ℓ) reflections; PMN-PbTiO3; buffered substrates; deposition geometry; epitaxial films; epitaxial growth; ferroelectric properties; film architectures; leakage currents; perovskite phase growth; pulsed laser deposition; pyrochlore structure; secondary phase; structural properties; Epitaxial growth; Geometry; Reflection; Substrates; Surface treatment; Temperature measurement; Epitaxial Films; Ferroelectric; PLD; PMN; PT;
Conference_Titel :
Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM), 2014 Joint IEEE International Symposium on the
Conference_Location :
State College, PA
DOI :
10.1109/ISAF.2014.6922996
