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Inorganic Materials

, Volume 53, Issue 5, pp 489–495 | Cite as

Structure and optical properties of LiNbO3:ZnO (3.43–5.84 mol %) crystals

  • N. V. Sidorov
  • N. A. Teplyakova
  • A. A. Yanichev
  • M. N. Palatnikov
  • O. V. Makarova
  • L. A. Aleshina
  • A. V. Kadetova
Article

Abstract

LiNbO3:ZnO (3.43–5.84 mol %) crystals have been studied using Raman spectroscopy and fullprofile analysis of X-ray diffraction data. The results demonstrate that, at ZnO concentrations above 3.95 mol %, their structure is free of NbLi basic defects, which are characteristic of congruent lithium niobate crystals. Increasing the Zn concentration leads to changes in the arrangement of structural units in the cation sublattice along the polar axis and distorts the BO6 (B = Nb, Li, Zn, or a vacancy) oxygen octahedra. In the Raman spectra of the crystals, the width of the line at a frequency of 876 cm–1, which corresponds to stretching modes of the oxygens in the BO6 octahedra, has been shown to increase considerably, which may be due to changes in the character of bonding in the B–O–B bridges in response to changes in the Zn concentration in the crystals. The gradual increase in the electro-optical coefficients of the LiNbO3:ZnO crystals with increasing zinc concentration can be accounted for by changes in the ionic contribution to these bonds.

Keywords

single crystal lithium niobate doping zinc cations Raman scattering full-profile analysis of Xray diffraction data stretching modes 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • N. V. Sidorov
    • 1
  • N. A. Teplyakova
    • 1
  • A. A. Yanichev
    • 1
  • M. N. Palatnikov
    • 1
  • O. V. Makarova
    • 1
  • L. A. Aleshina
    • 2
  • A. V. Kadetova
    • 2
  1. 1.Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific CenterRussian Academy of SciencesApatity, Murmansk oblastRussia
  2. 2.Petrozavodsk State UniversityKareliaRussia

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