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Ferroelectric property of an epitaxial lead zirconate titanate thin film deposited by a hydrothermal method

Published online by Cambridge University Press:  01 February 2011

Takeshi Morita
Affiliation:
Research Institute of Electrical Communication, Tohoku University, 2–1–1 Katahira, Aoba-ku, Sendai, Miyagi, 980–8577, Japan
Yasuo Wagatsuma
Affiliation:
Research Institute of Electrical Communication, Tohoku University, 2–1–1 Katahira, Aoba-ku, Sendai, Miyagi, 980–8577, Japan
Yasuo Cho
Affiliation:
Research Institute of Electrical Communication, Tohoku University, 2–1–1 Katahira, Aoba-ku, Sendai, Miyagi, 980–8577, Japan
Hitoshi Morioka
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, GI-405, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226–8502, Japan
Hiroshi Funakubo
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, GI-405, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226–8502, Japan
Setter Nava
Affiliation:
Ceramics Laboratory, Faculty of Engineering, Material Institute, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
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Abstract

Hydrothermal method has various advantages; low deposition temperature, high-purity, deposition on a three-dimensional structure and a large thickness. Although epitaxial PZT thin film deposition has reported, ferroelectric measurement has not been conducted due to the peel-off morphology of the film. The present paper investigates the improvement of an epitaxial PZT thin film deposited via a hydrothermal method. By adjusting the position at which the substrate was suspended in the solution, smooth morphology surface was successfully obtained. As a bottom electrode, 200 nm SrRuO3 thin film was deposited on SrTiO3 single crystals, and the PZT thin was deposited on SrRuO3. The remanent polarization 2Pr for PZT on SrRuO3/SrTiO3 (001) was 19.5 μC/cm2 and that of PZT on SrRuO3/SrTiO3 (111) was 37.2 μC/cm2 respectively. The self alignment poling direction was confirmed via scanning nonlinear dielectric microscopy and is thought to have been related to the deposition mechanisms.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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References

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