Domain structure of epitaxial PbTiO{sub 3} thin films on LaAlO{sub 3}(100) grown by metal organic chemical vapor deposition
- Department of Material Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
Lead titanate (PbTiO{sub 3}) thin film has been deposited on lathanum aluminate LaAlO{sub 3}(100) (using pseudocubic index) single crystalline substrate by metal organic chemical vapor deposition at 550{endash}700thinsp{degree}C. Microstructure of the films has been studied by the four-circle x-ray diffraction and transmission electron microscopy methods. Due to the noncubic symmetry of the LaAlO{sub 3} substrate at room temperature, the grown films exhibited more complex domain structure than those grown on cubic MgO or SrTiO{sub 3} substrates. The x-ray pole figure of LaAlO{sub 3} pseudocubic (002) peak has revealed two separate peaks at room temperature, indicating the existence of the two types of domain in the substrate. Consequently, the epitaxially grown PbTiO{sub 3} films were found to exhibit two distinguishable {ital c} domains, and eight {ital a}-domain peaks, as demonstrated by the x-ray pole figures employing PT(002) and PT(200) Bragg peaks. The domain structure and the domain formation mechanism are discussed in this article. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 289244
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 85; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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