Oxygen equilibrium and its detection in Bi2TeO5 crystals by Raman spectroscopy

I. Földvári, R. S. Klein, G. E. Kugel, Á Péter

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The 1/1 binary oxide of TeO2 and Bi2O3 exists in different oxidation forms. The composition stable at room temperature is Bi2TeO5, while at higher temperatures (600-700 °C) the fully oxidized form, Bi2TeO6, is stable. The single crystal of Bi2TeO5 shows interesting photorefractive properties. The oxidation state of the melt grown Bi2TeO5 crystal is a crucial question in controlling its physical parameters for applications. Specific Raman lines were shown to be sensitive to the oxidation/reduction history of the crystal. Especially, the intensity of the 762 cm-1 Raman line, in given orientation and polarization geometries, is recommended as a non-destructive test for the actual oxidation status of the Bi2TeO5 crystals.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalRadiation Effects and Defects in Solids
Volume151
Issue number1
DOIs
Publication statusPublished - Jan 1 1999
EventProceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98 - Keele, UK
Duration: Jun 6 1998Jun 11 1998

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ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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