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

K. Lengyel, Zs Szaller, A. Péter, K. Polgar, L. Kovács

Research output: Contribution to journalArticle

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 - 2008

Fingerprint

Doping (additives)
Crystals
Crystal growth from melt
Thermal gradients
Ferroelectric materials
crystals
Raman scattering
Etching
Czochralski method
pulling
Single crystals
doped crystals
Geometry
etching
Raman spectra
gradients
Experiments
single crystals
geometry
lithium niobate

Keywords

  • LiNbO:Y:Mg
  • Periodic domain structure
  • PPLN
  • Raman spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Microscopic and raman spectroscopic investigation of the domain structures in LiNbO3 : Y:Mg crystals. / Lengyel, K.; Szaller, Zs; Péter, A.; Polgar, K.; Kovács, L.

In: Ferroelectrics, Vol. 368, No. 1 PART 2, 2008, p. 3-11.

Research output: Contribution to journalArticle

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