High-Performance Ferroelectric Bi4Ti3O12 Single Crystals Grown by Top-Seeded Solution Growth Method under High-Pressure Oxygen Atmosphere
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概要
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The top-seeded solution growth (TSSG) method under high oxygen pressure ($P_{\text{O$_{2}$}}$) atmosphere has been developed to obtain large high-performance single crystals of ferroelectric Bi4Ti3O12. Crystals grown at 960 °C at a $P_{\text{O$_{2}$}}$ of 0.9 MPa exhibited well-saturated hysteresis with a remanent polarization of 48 μC/cm2 and a coercive field of 29 kV/cm. The results of piezoresponse force microscopy indicate that polarization switching is accomplished throughout the crystals. Electric-field-induced strain measurements along the $a$ axis yield a piezoelectric constant $d_{11}{}^{*}$ of 37 pm/V for Bi4Ti3O12.
- 2010-09-25
著者
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Miyayama Masaru
Research Center For Advanced Science And Technology (rcast) The University Of Tokyo
-
Noguchi Yuji
Research Center For Advanced Science And Technology The University Of Tokyo
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Kitanaka Yuuki
Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
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