Effects of substrate thermal mismatch on the domain structure of MOCVD-derived potassium niobate thin films

M. J. Nystrom*, B. W. Wessels

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Domain stabilization in epitaxial potassium niobate films deposited by metalorganic chemical vapor deposition was studied. Stabilization was examined for films deposited on substrates with different coefficients of thermal expansion. X-ray diffraction of KNbO3 films deposited on (100) MgAl2O4, (r) Al2O3, and (100)pseudocubic YAlO3 substrates shows a mixed domain structure consisting of (110) and (001) domains. However, KNbO3 thin films deposited under identical conditions on (100) MgO, (100) SrTiO3, and (100)pseudocubic LaAlO3 substrates exhibited only a single domain variant. A direct correlation between (001) domain volume fraction in the as-deposited KNbO3 films and calculated strain resulting from thermal mismatch is observed.

Original languageEnglish (US)
Pages (from-to)31-36
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume477
DOIs
StatePublished - 1997
EventProceedings of the 1997 MRS Spring Meeting - San Francisco, CA, USA
Duration: Mar 31 1997Apr 3 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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