Raman Spectra Study of K0.5Na0.5NbO3 Ferroelectric Thin Films
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概要
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We have fabricated K0.5Na0.5NbO3 (KNN) thin films on Pt substrates by a chemical solution deposition method and investigated the effect of K and Na excess (0–30 mol %) for KNN thin film. The KNN film with 20 mol % excess K and Na was an optimized KNN perovskite phase. From the Raman spectra, a change in the scattering mode was observed due to the chemical composition fluctuations of the excess K and Na. The peak of the ($v_{1} + v_{5}$) internal vibrational mode in the NbO6 octahedra was split into two vibration modes which were shifted toward lower or higher wavenumbers depending on the K and Na cation deficiencies or redundancies.
- 2010-09-25
著者
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Park Gwangseo
Department Of Physics Sogang University
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Lee Hai
Department Of Chemistry Inha University
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Lee Kwang
School Of Electrical Engineering And Inmc Seoul National University
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Jin Byung
Department of Biochemistry & Molecular Biology, Neurodegeneration Control Research Center, School of
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Cheong Hyeonsik
Department Of Physics Sognag University
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Ahn Chang
Convergence Components Research and Development Division, Korea Electronics Technology Institute, Seongnam 468-816, Korea
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Kim Ill
Department of Physics and Energy Harvest-Storage Research Center, University of Ulsan, Ulsan 680-749, Korea
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Kim Ill
Department of Physics, University of Ulsan, Ulsan 680-749, Korea
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Hwang Hak-In
Convergence Components R&D Division, KETI, Seongnam 463-816, Korea
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Park Sungmin
Department of Physics, Sokang University, Seoul 100-611, Korea
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Yoon Doohee
Department of Physics, Sokang University, Seoul 100-611, Korea
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Hwang Hak-In
Convergence Components R&D Division, KETI, Seongnam 463-816, Korea
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Ahn Chang
Convergence Components R&D Division, KETI, Seongnam 463-816, Korea
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Cheong Hyeonsik
Department of Physics, Sokang University, Seoul 100-611, Korea
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Lee Hai
Department of Physics, University of Ulsan, Ulsan 680-749, Korea
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Jin Byung
Department of Physics, Dong Eui University, Busan 614-714, Korea
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Park Gwangseo
Department of Physics, Sokang University, Seoul 100-611, Korea
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Lee Kwang
School of Computer Aided Science, Inje University, Kimhae 621-749, Korea
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