Kinetics of ESR Lines and Photocurrent in KTaO_3 Doped with Ni
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概要
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An attempt is made to locate energy-levels associated with photochromic centers in the band gap of KTaO_3 doped with nickel. The thermally-stimulated current and the kinetics of ESR lines under illumination are measured over the temperature range from 90 K to 300 K. The results suggest the following energy-level assignments: the energy-levels of oxygen-vacancy (V_0) with one electron, Ni^<3+>-V_0 with two electrons and Ni^<3+>-V_0 with one electron are 0.13-0.18 eV, 0.39 eV and 0.49 eV from the conduction band, respectively. On the other hand, Fe^<3+> acts as a deep acceptor. The kinetics of the photocurrent and ESR lines under coloring and bleaching are qualitatively explained by the three-center model proposed in this paper.
- 社団法人応用物理学会の論文
- 1982-07-20
著者
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Ohi Kikuo
Department of Physics, School of Science and Engineering, Waseda University
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Ohi Kikuo
Department Of Physics Ochanomizu University
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Akishige Yukikuni
Department Of Physics Faculty Of Education Shimane University
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YAMAMOTO Yujiroh
Department of Physics, School of Science and Engineering, Waseda University
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