Ferroelectric and Structural Properties of Sr0.5Ba0.5Nb2O6 Thin Films on La0.05Sr0.95TiO3 Substrate
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概要
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$C$-axis-oriented Sr0.5Ba0.5Nb2O6 (SBN) thin films were prepared on a La0.05Sr0.95TiO3 substrate by pulsed laser deposition. The $c$-axis orientation and grain size of the SBN thin films depend on the substrate temperature ($T_{\text{sub}}$) and oxygen gas pressure ($P_{\text{O$_{2}$}}$) during the deposition. When $T_{\text{sub}}$ and $P_{\text{O$_{2}$}}$ were fixed at 750 °C and 11 mTorr, respectively, a prepared SBN thin film exhibited a distinct $c$-axis orientation and a smooth surface. The SBN thin film consisted of well-developed grains with a diameter of 150 nm. Its remanent polarization ($P_{\text{r}}$) and coercive field ($E_{\text{c}}$) were $2P_{\text{r}}=23.9$ μC/cm2 and $2E_{\text{c}}=160$ kV/cm, respectively. The band gap of the distinctly $c$-axis-oriented SBN thin film was about 3.1 eV, which is in agreement with that of the SBN single crystal.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-09-30
著者
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Tsukamoto Takeyo
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Higuchi Tohru
Department Of Applied Physics Faculty Of Science Tokyo Univ. Of Science
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Ebina Yoshiki
Department Of Applied Physics Tokyo University Of Science
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Hattori Takeshi
Department Of Applied Physics Faculty Of Science Science University Of Tokyo:(present)the Institute
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Hattori Takeshi
Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan
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Ebina Yoshiki
Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan
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