A complete strain-temperature phase diagram for BiFeO3 films on SrTiO3 and LaAlO3 (0 0 1) substrates

W. Siemons, C. Beekman, G. J. MacDougall, J. L. Zarestky, S. E. Nagler, H. M. Christen

Research output: Contribution to journalArticlepeer-review

Abstract

BiFeO3 has a complex phase diagram as function of both strain and temperature, undergoing a morphotropic phase transformation under large compressive strain. Epitaxial films, grown by pulsed laser deposition, are ideal for the study of the intricate phase coexistence between multiple polymporphs. Three polymorphs have been identified in the literature. They are carefully described in this paper (labelled R′, T′, and S′). As both ferroelectric and magnetic properties are typically strongly linked to structural distortions, the structural, ferroelectric and magnetic transition temperatures are expected to differ between the R′, T′ and S′ polymorphs. In this paper we present a complete strain-temperature phase diagram for each of the polymorphs.

Original languageEnglish (US)
Article number034011
JournalJournal of Physics D: Applied Physics
Volume47
Issue number3
DOIs
StatePublished - Jan 22 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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