Growth mode transition to pyramid from layer by layer of heteroepitaxial PbTiO3 islands on a (001) vicinal SrTiO3 substrate fabricated by hydrothermal epitaxy

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The authors observed the surface morphology transition from the atomically flat two dimensional layer-by-layer mode to the three dimensional pyramidal mode of heteroepitaxial PbTiO3 (PTO) islands synthesized by hydrothermal epitaxy by scanning electron microscopy and atomic force microscopy. Two types of (001) Nb-SrTiO3 (NSTO) with the same step height, similar to 0.25 and similar to 1 mu m terrace widths, were used for substrates. They found the critical island thickness at which the growth mode of PTO island was converted and its relation to the terrace width of the substrate. It is suggested that the relaxation of the misfit strain, which originates from out-of-plane lattice mismatch between the PTO island unit cell and the NSTO substrate step or somewhere interior of the film, has an effect on the PTO island growth mode transition.(c) 2007 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2007-08
Language
English
Article Type
Article
Keywords

THIN-FILMS; DEPOSITION

Citation

APPLIED PHYSICS LETTERS, v.91, no.9, pp.E63 - E63

ISSN
0003-6951
DOI
10.1063/1.2777171
URI
http://hdl.handle.net/10203/10876
Appears in Collection
MS-Journal Papers(저널논문)
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