Dielectric Properties and Phase Transition in CaCu3Ti4O12 at High Temperatures
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概要
- 論文の詳細を見る
The dielectric properties and structural behavior of perovskite-related CaCu3Ti4O12 were studied at high temperatures. The dielectric constant increases gradually with increasing temperature and shows a shoulder-like round anomaly at approximately 630 K at 10 kHz. At 732 K, a new dielectric anomaly was found, where the peak value of the dielectric constant, $\varepsilon_{\text{peak}}\simeq 2.8\times 10^{6}$ at a frequency of 10 kHz. The lattice constant and X-ray intensity of the (880) reflection also exhibit an anomaly at 732 K. These findings indicate that CaCu3Ti4O12 undergoes a structural phase transition at 732 K.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-09-25
著者
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Onodera Akira
Department Of Molecular Life Science Tokai University School Of Medicine
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Takesada Masaki
Department Of Physics Faculty Of Science Yamaguchi University
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Hiramatsu Shogo
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0801, Japan
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Kawatani Keiichi
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0801, Japan
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Takesada Masaki
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0801, Japan
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Onodera Akira
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0801, Japan
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