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Optical properties of aluminum oxide after irradiation with cobalt ions

  • Proceedings of the XXXVIII International Conference on Physics of Interaction of Charged Particles with Crystals (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia, 2008)
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Abstract

Optical absorption of leucoosapphire and polycrystalline corund (polycor) is studied after irradiation with cobalt ions and subsequent annealing in a vacuum. The structure of states localized in the forbidden band and induced by various imperfections has a higher stability to annealing as compared to the case of implantation of other types of ions into aluminum oxide. The fan-like behavior of the dose-dependent absorption spectra is a consequence of the defect-induced disordering of crystal lattices. It is determined that intrinsic radiation-induced defects, substitutional defects, complexes containing them, and Co nanoparticles have an influence on the parameters of the focal point of the absorption spectra. The parameters of the interband and exponential absorption demonstrate the formation of a new multidefect material with a band gap width ranging from 5.3 to 5.5 eV and an absorption edge at 2.0–5.2 eV caused by the localized states of defect clusters.

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Authors and Affiliations

  1. Research Institute of High Voltages, Tomsk Polytechnic University, Tomsk, 634050, Russia

    A. V. Kabyshev & F. B. Konusov

Authors
  1. A. V. Kabyshev
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  2. F. B. Konusov
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Original Russian Text © A.V. Kabyshev, F.B. Konusov, 2009, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, No. 4, pp. 54–62.

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Kabyshev, A.V., Konusov, F.B. Optical properties of aluminum oxide after irradiation with cobalt ions. J. Surf. Investig. 3, 304–312 (2009). https://doi.org/10.1134/S1027451009020256

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  • DOI: https://doi.org/10.1134/S1027451009020256

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