Optical properties of aluminum oxide after irradiation with cobalt ions

A. V. Kabyshev, F. B. Konusov

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)304-312
Number of pages9
JournalJournal of Surface Investigation
Volume3
Issue number2
DOIs
Publication statusPublished - Feb 2009

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Aluminum Oxide
Cobalt
Optical properties
Irradiation
Ions
Aluminum
Defects
Oxides
Absorption spectra
Annealing
Crystal lattices
Ion implantation
Light absorption
Fans
Energy gap
Vacuum
Nanoparticles
Radiation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Optical properties of aluminum oxide after irradiation with cobalt ions. / Kabyshev, A. V.; Konusov, F. B.

In: Journal of Surface Investigation, Vol. 3, No. 2, 02.2009, p. 304-312.

Research output: Contribution to journalArticle

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