Microstructure and optical loss in epitaxial (Pb,La)TiO3 thin films on (001)MgO
SCIE
SCOPUS
- Title
- Microstructure and optical loss in epitaxial (Pb,La)TiO3 thin films on (001)MgO
- Authors
- Kang, YM; Baik, S
- Date Issued
- 1998-04
- Publisher
- MATERIALS RESEARCH SOCIETY
- Abstract
- Surface morphologies and microstructures of epitaxial (Pb1-xLax)TiO3 (PLT, x = 0.00, 0.08, 0.16, and 0.24) thin films grown on (001) MgO have been investigated using SEM, AFM, and TEM. Surface roughness of PLT films varies severely with La concentration. For 0.08La-PLT film, very smooth surface has been achieved with 9.3 Angstrom of RMS roughness. 0.00La- and 0.08La-PLT films show 90 degrees domain structure, and periodic dimension of the domain is reduced by La substitution. 0.16La- and 0.24La-PLT films show the presence of triangular grains, causing rough surface and poor crystal quality. However, they are distributed uniformly in 0.16La-PLT film while agglomerated in 0.24La-PLT film. Optical propagation losses of PLT films measured by prism coupling technique were 22.3, 6.0, 11.4, and 20.7 dB/cm for x = 0.00, 0.08, 0.16, and 0.24, respectively. Such a variation in optical losses seemed to be due to the surface morphology and abundance of domain boundaries that change continuously as a function of La concentration in epitaxial PLT thin films.
- Keywords
- PULSED-LASER DEPOSITION; GROWTH
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20763
- DOI
- 10.1557/JMR.1998.0140
- ISSN
- 0884-2914
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS RESEARCH, vol. 13, no. 4, page. 995 - 1001, 1998-04
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- There are no files associated with this item.
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