Compositional dependence and structure of hydroxyl ion defects in ferroelectric potassium lithium niobate

I. Hajdara, K. Lengyel, L. Kovács, Á Péter, G. Dravecz, Z. S. Szaller

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The OH- stretch mode spectra have been measured in both ferroelectric (KLN-1) and non-ferroelectric (KLN-2) potassium lithium niobate crystals grown from different melt compositions. OH bond directions of about 15, 60, and 15 degrees with respect to the c-axis have been determined for the three main OH- bands in KLN-1 peaking at about 3440, 3500, and 3520 cm-1, respectively. Correlations have been found along the growth axis of the crystal between the decrease of the excess Nb content, the change of the hydroxyl band components at 3440 and 3520 cm-1, and the Raman modes at 540 cm-1 and 640 cm-1.

Original languageEnglish
Pages (from-to)98-107
Number of pages10
JournalFerroelectrics
Volume369
Issue number1 PART 3
DOIs
Publication statusPublished - Dec 1 2008
Event11th European Meeting on Ferroelectricity, EMF-2007 - Bled, Slovenia
Duration: Sep 3 2007Sep 7 2007

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Keywords

  • Compositional dependence
  • Defect structure
  • Hydroxyl ion vibration
  • KLN crystals
  • Raman spectra

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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