Long-range strains and the effects of applied field at 180° ferroelectric domain walls in lithium niobate

Terrence Jach, Sungwon Kim, Venkatraman Gopalan, Stephen Durbin, David Bright

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

Ferroelectric domains with antiparallel polarization are readily induced in congruent LiNbO3 with electric fields above 240 kV/cm at room temperature. Even in the absence of external fields, these 180° walls exhibit wide regions of shear strain, on the order of 10-5, within a 10-μm range of the domain walls. Using x-ray topography on samples while applying electric fields of 0-90 kV/cm, we have observed large-scale reversible domain changes. A detailed strain analysis of the piezoelectric behavior at the domain walls, as well as within the domains, indicates that substantial surface displacement is associated with the high contrast of ferroelectric domains in x-ray topographs. These observations show that long-range strain interactions due to applied fields are present around domain walls long before permanent changes are induced.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number6
DOIs
StatePublished - Feb 27 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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