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Small-strain (100)/(001)-oriented epitaxial PbTiO3 films with film thickness ranging from nano- to micrometer order grown on (100)CaF2 substrates by metal organic chemical vapor deposition

Published online by Cambridge University Press:  07 February 2013

Mohamed-Tahar Chentir
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Satoru Utsugi
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Takashi Fujisawa
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Yoshitaka Ehara
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Mutsuo Ishikawa
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Hitoshi Morioka
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; and Application Laboratory, Bruker AXS, Kanagawa-ku, Yokohama, 221-0022, Japan
Tomoaki Yamada
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan; Department of Materials, Physics and Energy Engineering, Nagoya University (PRESTO), Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; and Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0075, Japan
Masaaki Matsushima
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
Hiroshi Funakubo*
Affiliation:
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Changes in crystal structure and ferroelectric properties are investigated for (100)/(001)-oriented epitaxial PbTiO3 thin films grown on CaF2 substrates by metal organic chemical vapor deposition. In this work, PbTiO3 films, with thickness ranging from 60 to 2000 nm, presented volume fraction of (001)-oriented c-domain higher than 90%. Hence, the residual strain is smaller compared to films deposited on widely investigated SrTiO3 substrates. Additionally, more than 60 μC/cm2 remnant polarization is obtained for all film thickness ranges, and the estimated spontaneous polarization taking into account c-domain volume fraction is about 80 μC/cm2 regardless of film thickness, in good agreement with reported values for the single crystal.

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Articles
Copyright
Copyright © Materials Research Society 2013

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