High-quality single crystal growth of Bi-based perovskite ferroelectrics based on defect chemistry
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概要
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We present the O_2-blowing method for the growth of high-quality single crystals of Bi-based perovskite ferroelectrics, in which O_2 gas is directly introduced inside crucibles during crystal growth. The O_2-blowing method is demonstrated to be effective for enhancing polarization and piezoelectric properties as well as reducing leakage current for (Bi,Na)TiO_3-BaTiO_3 crystals. The superior properties are suggested to originate from the reduced reorientation of non-180°domains. Ab initio calculations suggest that the interaction between spontaneous polarization and defect dipole composed of Bi vacancy and O vacancy is the origin of the reorientation of non-180° domains.
- 2008-09-01
著者
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Noguchi Yuji
Res. Center For Advanced Sci. And Technol. The Univ. Of Tokyo
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NOGUCHI Yuji
Research Center for Advanced Science and Technology, University of Tokyo
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Miyayama Masaru
Research Center For Advanced Science And Technology (rcast) The University Of Tokyo
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Tanabe Ichiro
Research Center For Advanced Science And Technology The University Of Tokyo
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SUZUKI Muneyasu
Research Center for Advanced Science and Technology, The University of Tokyo
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Noguchi Yuji
Research Center For Advanced Science And Technology The University Of Tokyo
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Noguchi Yuji
Research Center for Advanced Science and Technology, The University of Tokyo
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MIYAYAMA Masaru
Research Center for Advanced Science and Technology, The University of Tokyo
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