Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO 3 thin films

Cheng Liang Lu*, Jun Ming Liu, Tao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Highly compressively strained BiFeO 3 thin films with different thickness are epitaxially grown on (001) LaAlO 3 substrates and characterized using various techniques. The quasi-tetragonal phase with a giant axial ratio of ~ 1.25 and its thickness-dependent evolution are investigated. An interesting twining structure of the quasi-tetragonal phase is evidenced in thicker films through detailed reciprocal space mapping, which becomes more pronounced with increasing film thickness. Moreover, an interesting electric-field driven phase transition was evidenced in the film with a thickness of 38 nm, in which the quasi-tetragonal and rhombohedral phases are close to each other in energy landscape.

Original languageEnglish (US)
Pages (from-to)424-428
Number of pages5
JournalFrontiers of Physics
Volume7
Issue number4
DOIs
StatePublished - Aug 1 2012

Keywords

  • antiferromagnetic
  • ferroelectricity
  • phase transition

ASJC Scopus subject areas

  • Biophysics
  • Materials Science (miscellaneous)
  • Mathematical Physics
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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