Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9829407 | Journal of Crystal Growth | 2005 | 6 Pages |
Abstract
BaTiO3 bilayer films are deposited on SrTiO3 substrates under different oxygen pressures by pulsed laser deposition. The structural properties of the bilayers are investigated by means of X-ray diffraction, Rutherford backscattering spectrometry, conventional and high-resolution transmission electron microscopy. The BaTiO3 layer with the thickness of 115Â nm deposited under higher oxygen pressure (3Ã10â1mbar) exhibits a cubic-like structure with lattice parameter a=0.399nm. The BaTiO3 layer with the thickness of 220Â nm deposited under lower oxygen pressure (2Ã10â3Â mbar) shows a c-axis-oriented domain structure with lattice parameters a=0.401nm and c=0.411nm. The interface of the BaTiO3 bilayer films is coherent and no interfacial dislocations can be seen over larger regions. The misfit dislocations with Burgers vector of type aã1Â 0Â 0ã are observed at the interface between bottom BaTiO3 layer and SrTiO3 substrates.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
S.B. Mi, C.L. Jia, T. Heeg, O. Trithaveesak, J. Schubert, K. Urban,