Microscopic and raman spectroscopic investigation of the domain structures in LiNbO3:Y:Mg crystals

K. Lengyel, Zs Szaller, A. Peter, K. Polgar, L. Kovacs

Research output: Conference article

Abstract

Formation of periodic domain structure in Mg, Y and Mg+Y co-doped congruent LiNbO3 single crystals grown by off-centered Czochralski method in the X and 148Y pulling directions has been investigated. The developed domain structures were explained as functions of the thermal gradient during growth and the amount of Y and Mg dopants, the latter dopant determining the coercive field in the crystal. Raman spectra were measured in Z(YY)Z and Z(YX)Z geometry on periodically poled LiNbO3 crystal doped with 2 mol% Mg and 0.65 mol% Y. A Raman band at about 610 cm-1 (presumably related to the E(TO9) mode) occured at the ferroelectric domain boundaries related to periodic step-like forms on the surface as proved by time-dependent etching experiments.

Original languageEnglish
Pages (from-to)3-11
Number of pages9
JournalFerroelectrics
Volume368
Issue number1 PART 2
DOIs
Publication statusPublished - dec. 1 2008
Event11th European Meeting on Ferroelectricity, EMF-2007 - Bled, Slovenia
Duration: szept. 3 2007szept. 7 2007

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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