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Composition- and pressure-induced ferroelectric to antiferroelectric phase transitions in Sm-doped BiFeO3 system

  • Fei Xue
  • , Linyun Liang
  • , Yijia Gu
  • , Ichiro Takeuchi
  • , Sergei V. Kalinin
  • , Long Qing Chen
  • Pennsylvania State University
  • University of Maryland, College Park
  • Oak Ridge National Laboratory

Research output: Contribution to journalArticlepeer-review

Abstract

A three-dimensional phenomenological model is proposed to describe both ferroelectricity and antiferroelectricity based on the Ginzburg-Landau-Devonshire theory. Its application to the multiferroic Sm-doped BiFeO3 system describes the temperature-, pressure-, and composition-induced ferroelectric to antiferroelectric phase transitions. The constructed temperature-composition and temperature-pressure phase diagrams show that compressive hydrostatic pressure and Sm doping have similar effects on the ferroelectric and antiferroelectric phase transitions. It is also indicated from the temperature-pressure phase diagram that the experimentally observed phase of BiFeO3 under the hydrostatic pressure from 3 GPa to 10 GPa is a PbZrO3-like antiferroelectric phase.

Original languageEnglish
Article number012903
JournalApplied Physics Letters
Volume106
Issue number1
DOIs
StatePublished - 5 Jan 2015
Externally publishedYes

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