Chemical Processing and Characterization of Ferroelectric (K,Na)NbO3 Thin Films
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概要
- 論文の詳細を見る
Lead-free ferroelectric K0.5Na0.5NbO3 (KNN) thin films have been synthesized by the chemical solution deposition. The optimization of excess amounts of K and Na in KNN precursor solutions was found to be effective for achieving perovskite KNN single-phase thin films with improved leakage current properties. It was revealed from Raman spectroscopic analysis data that a change in scattering mode was observed for the KNN thin films fabricated under various processing conditions. This change was due to the chemical composition fluctuation of K and Na in the KNN thin films after heat treatment. The leakage current and ferroelectric properties of the perovskite KNN thin films were strongly affected by the excess amounts of K and Na as well as the heating conditions of the precursor films. Optimized KNN thin films with 10 mol % excess K and Na exhibited a ferroelectric polarization–electric field ($P$–$E$) hysteresis loop with $2P_{\text{r}}$ and $2E_{\text{c}}$ values of 14 μC/cm2 and 140 kV/cm, respectively.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-10-30
著者
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Yogo Toshinobu
Division Of Nanomaterials Science Ecotopia Science Institute Nagoya University
-
Sakamoto Wataru
Division Of Applied Biosciences Graduate School Of Agriculture Kyoto University
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SHIMURA Tetsuo
Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University
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Nakashima Yoshifumi
Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Sakamoto Wataru
Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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