Optical Properties of BiFeO3-System Multiferroic Thin Films
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概要
- 論文の詳細を見る
The optical properties of the chemical solution deposition (CSD)-derived BiFeO3 (BFO) film and the pulsed laser deposition (PLD)-derived (Bi,Nd)(Fe,Mn)O3 (BNFM) film were evaluated by spectroscopic ellipsometry, and their optical constants $(n, k)$ and band gaps were determined. At a wavelength of 600 nm, the refractive indexes of 3.22 and 2.87 were estimated for the BFO and BNFM films, respectively, although the existence of a refractive index gradient was suggested in the BFO film. In addition, at a wavelength of 1550 nm, which is generally used for optical communication, the refractive indexes of 2.91 and 2.59 were estimated for the BFO and BNFM films, respectively. The band gaps of the BFO and BNFM films were estimated to be 2.79 and 2.72 eV, respectively, and it was confirmed that the extinction coefficients of both films were almost zero at wavelengths larger than 600 nm. These results suggest that the BFO-system multiferroic films have a high potential as an optical material with a high refractive index.
- 2009-09-25
著者
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Okamura Soichiro
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Kawae Takeshi
Graduate School Of Natural Science And Technology Kanazawa University
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SHIMA Hiromi
Department of Applied Physics, Faculty of Science, Tokyo University of Science
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SUZUKI Michio
J. A. Woollam Japan Corporation
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Morimoto Akiharu
Graduate School Of Natural Science And Technology Kanazawa University
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Naganuma Hiroshi
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Nakajima Takashi
Department Network And Computer Engineering School Of Information And Design Engineering Tokai Unive
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TADOKORO Toshiyasu
Techno Synergy Inc.
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Iijima Takashi
Research Center For Hydrogen Industrial Use And Storage National Institute Of Advanced Industrial Sc
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Shima Hiromi
Department of Applied Physics, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Nakajima Takashi
Department of Applied Physics, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Matsuda Masahiro
J. A. Woollam Japan, Suginami, Tokyo 167-0051, Japan
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Suzuki Michio
J. A. Woollam Japan Co., Fuji Building 2F, 5-22-9 Ogikubo, Suginami-ku, Tokyo 167-0051, Japan
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