Phase stability of heteroepitaxial polydomain BaTiO3 thin films

A. L. Meier, A. Y. Desai, L. Wang, T. J. Marks, B. W. Wessels

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The phase stability of ferroelectric, epitaxial, polydomain BaTiO3 thin films was examined using temperature-dependent x-ray diffraction (XRD) and in-plane electronic polarization measurements. The epitaxial BaTiO3 thin films were grown on MgO(100) substrates by a metal-organic chemical vapor deposition process. As-deposited and annealed BaTiO3 thin films with different domain structures were examined. Temperature-dependent plane-normal XRD analysis reveals well-defined phase transitions at 140 and 169 °C in the c- and a-oriented films, respectively. The measured Curie temperatures are consistent with those predicted by Landau-Ginsburg-Devonshire theory as applied to polydomain BaTiO3 thin films. Temperature-dependent in-plane electronic polarization measurements confirm that the 140 °C Curie temperature observed in the c-oriented film is a well-defined second-order paraelectric-ferroelectric transition.

Original languageEnglish
Pages (from-to)1384-1389
Number of pages6
JournalJournal of Materials Research
Volume22
Issue number5
DOIs
Publication statusPublished - May 1 2007

ASJC Scopus subject areas

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

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