Photochemical approach to analysis of ferroelectric transition in Ba xSr1-xTiO3 epitaxial films

Keisuke Ohara, Takeo Ohsawa, Hideomi Koinuma, Yuji Matsumoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

When Sr1-xBaxTiO3 (0 < x < 1) epitaxial film is illuminated with UV-visible light (377 to 483 nm) in aqueous AgNO3 solutions, a photochemical reaction product of Ag is deposited on the film surface. The compositional dependences of the amount of Ag and band gap show an abrupt change at x = 0.6, i.e., near Ba0.6Sr 0.4TiO3, which has its Curie temperature near room temperature. On the basis of an analysis of these behaviors near the ferroelectric transition, it is found that ferroelectric and paraelectric domains coexist in the composition ratio range of x = 0.5 to 0.7, as confirmed by X-ray diffraction.

Original languageEnglish
Pages (from-to)L339-L342
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume45
Issue number8-11
DOIs
Publication statusPublished - 2006 Mar 10
Externally publishedYes

Keywords

  • BaTiO
  • Epitaxial film
  • Ferroelectrics
  • Oxide
  • Photocatalysis
  • SrTiO

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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