OH-related defects in LiNbO3:Mg,M (M = Nd, Cr, Ti, Mn) crystals

L. Kovács, Zs Szaller, I. Cravero, I. Földvári, C. Zaldo

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Abstract

In addition to the 3539 cm-1 OH- stretching vibration related to Mg2+OH- complexes, OH- bands at 3522 and 3506 cm-1 were found in MgNd and MgCr doubly doped LiNbO3 crystals, respectively. These bands, polarized perpendicular to the c-axis, are interpreted as an OH- vibration in an M3+OH-Mg2+ association. In this complex the OH- ion is assumed to be located between the M3+ and Mg2+ ions which occupy Nb5+ and Li+ sites, respectively. In Mg2+Ti4+ and Mg2+Mn2+ codoped LiNbO3, no OH- band corresponding to that kind of complex was observed. The absorption strength of the OH- ions involved in the M3+OH-Mg2+ association is about 6 × 10-20cm2 ion-1.

Original languageEnglish
Pages (from-to)417-420
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume51
Issue number5
DOIs
Publication statusPublished - 1990

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Keywords

  • IR absorption
  • LiNbO
  • OH vibration
  • defect complex
  • doubly-doped LiNbO

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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