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Temperature-Dependent Structure of Epitaxial (Ba,Sr)TiO3 Films Grown on SrRuO3-Covered SrTiO3 Substrates |
| HE Jia-Qing1,3;E. VASCO1,2;R. DITTMANN3;WANG Ren-Hui1 |
| 1Department of Physics and Center for Electron Microscopy, Wuhan University, Wuhan 430072
2Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, 28049 Cantoblanco, Madrid, Spain
3Institut für Festkörperforschung, Forschungzentrum Jülich GmbH, D-52425 Jülich, Germany |
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| Cite this article: |
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HE Jia-Qing, E. VASCO, R. DITTMANN et al 2006 Chin. Phys. Lett. 23 1269-1272 |
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Abstract Growth dynamics of epitaxial (Ba,Sr)TiO3 thin films deposited at different temperatures on SrRuO3/SrTiO3 substrates by pulsed laser deposition is investigated by transmission electron microscopy. The films exhibit a layered structure comprising sublayers with distinctive features in regard to the remaining strain, density of misfit dislocations and/or lattice defects, and growth habit. We correlate these temperature-dependent features with the predominant misfit-strain relaxation mechanisms for each one of the detected growth regimes. The thickness dependence of the film structure is discussed within the framework of the predictions for a kinetically modified Stranski--Krastanov growth mode.
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| Keywords:
68.37.Ip
68.55.-a
77.55.+f
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Published: 01 May 2006
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