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Morphology and Domain Structure of Unsupported PbTiO3 Thin Films Prepared by Sol-Gel Process

Published online by Cambridge University Press:  15 February 2011

C. J. Lu ,
S. B. Ren ,
H. M. Shen  and
Y. N. Wang
C. J. Lu
Affiliation:
National Laboratory of Solid State Microstructures Department of Physics, Nanjing University, Nanjing 210093, P.R. China, [email protected]
S. B. Ren
Affiliation:
National Laboratory of Solid State Microstructures Department of Physics, Nanjing University, Nanjing 210093, P.R. China, [email protected]
H. M. Shen
Affiliation:
National Laboratory of Solid State Microstructures Department of Physics, Nanjing University, Nanjing 210093, P.R. China, [email protected]
Y. N. Wang
Affiliation:
National Laboratory of Solid State Microstructures Department of Physics, Nanjing University, Nanjing 210093, P.R. China, [email protected]
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Abstract

The morphology and domain structure of unsupported PbTiO3 thin films with fine grains (>200 nm) were investigated by TEM technique. The unsupported PbTiO3 thin films were successfully prepared by sol-gel process onto NaCI substrates and followed by dissolving away the substrates. Electron diffiraction patterns showed that the unsupported PbTiO3 thin films had slight <110> preferred orientation perpendicular to the film surfaces. Grain size and morphology vary significantly with the thickness of the films or the annealing temperatures. Even though the grain size is rather small (40–180 nm), the domains are clearly visible. Most of the grains show single domain, while some irregular and curved domain walls appear only in a small portion of the fine grains. The number of single-domained grains increases with decreasing grain size. Almost all domain walls observed are 90° walls.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 403: Symposium I – Polycrystalline Thin Films: Structure, Texture, Properties and Applications II , 1995 , 585
Copyright
Copyright © Materials Research Society 1996

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