Domain Structure and Polarization Properties of Lanthanum-Substituted Bismuth Titanate Single Crystals
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- SOGA Masayuki
- Institute of Industrial Science, The University of Tokyo, JAPAN
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- TAKAHASHI Masatake
- Institute of Industrial Science, The University of Tokyo, JAPAN
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- NOGUCHI Yuji
- Institute of Industrial Science, The University of Tokyo, PRESTO, JAPAN
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- MIYAYAMA Masaru
- Institute of Industrial Science, The University of Tokyo, JAPAN
Abstract
Effects of lanthanum substitution on the polarization properties and domain structure of bismuth titanate (BiT, Bi4Ti3O12) were investigated using single crystals grown by self-flux method. With increasing La content (BLT, Bi4-xLaxTi3O12), parameter a and unit-cell volume decreased, while parameter b and c increased. The structural analysis revealed that La substitution resulted in a marked decrease in orthorhombic distortion (a/b) from 1.008 (BiT) to 1.000 (x=1.5). The lanthanum substitution resulted in a marked decrease in remanent polarization (Pr) and coercive field (Ec) of BLT single crystals along a-axis. The domain structures in the a-b plane were investigated with polarization microscopy and piezoelectric force microscopy (PFM). BiT had a striped 90-deg domain structure as well as a complex 180-deg one, and the average domain width was about 8.5μm. La substitution led to a decrease in domain size, and BLT(x=1.20) showed a domain structure with about 2.5μm domain width.
Journal
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- Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan
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Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan 2003F (0), 332-332, 2003
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282680589373184
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- NII Article ID
- 130006968702
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- Text Lang
- en
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed