Fabrication and Properties of Ge-Doped (Bi,Nd)4Ti3O12 Thin Films by Chemical Solution Deposition
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概要
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Nd- and Ge-codoped Bi4Ti3O12 thin films have been fabricated by chemical solution deposition. The effects of Ge doping in (Bi,Nd)4Ti3O12 on microstructural and ferroelectric properties were investigated for the development of low-temperature fabrication of ferroelectric Bi4Ti3O12-based thin films. Bi3.35Nd0.75Ti3-xGexO12 [$0\leq x\leq 0.5$] thin films were found to crystallize into the Bi4Ti3O12 phase above 600°C without forming any second phase. The crystal orientation and surface morphology of the synthesized films strongly depended on the Ge content of Bi3.35Nd0.75Ti3-xGexO12. Among various compositions of Bi3.35Nd0.75Ti3-xGexO12, Bi3.35Nd0.75Ti2.9Ge0.1O12 thin films showed excellent surface morphology and ferroelectricity regardless of the processing temperature. Furthermore, the doping of Ge below $x=0.1$ was found to be effective in improving the ferroelectric properties of the low-temperature-processed films. The $P_{\text{r}}$ values of Bi3.35Nd0.75Ti3-xGexO12 thin films with the optimum Ge content prepared at 600°C were above 15 μC/cm2 and equal to those of the films crystallized at 700°C.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-09-15
著者
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Yogo Toshinobu
Division Of Nanomaterials Science Ecotopia Science Institute Nagoya University
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MIZUTANI Yu-ki
Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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Iizawa Naoya
Department Of Materials Science And Engineering Shonan Institute Of Technology
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Sakamoto Wataru
Division Of Applied Biosciences Graduate School Of Agriculture Kyoto University
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Hirano Shin-ichi
Department Of Applied Chemistry Graduate School Of Engineering Nagoya University
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Hayashi Takashi
Department Of Applied Chemistry Graduate School Of Engineering Osaka University
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Iizawa Naoya
Department of Material Science and Engineering, Shonan Institute of Technology
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Mizutani Yu-ki
Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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