Ferroelectric-Paraelectric Transition in BiFeO3: Crystal Structure of the Orthorhombic β Phase

Donna Claire Arnold, Kevin S. Knight, Finlay D. Morrison, Philip Lightfoot

Research output: Contribution to journalArticlepeer-review

257 Citations (Scopus)

Abstract

A detailed investigation using variable temperature powder neutron diffraction demonstrates that BiFeO3 undergoes a phase transition from the ferroelectric alpha phase (rhombohedral, R3c) to a paraelectric beta phase (orthorhombic, Pbnm) between 820 degrees C and 830 degrees C. Coexistence of both phases over a finite temperature interval, together with abrupt changes in key structural parameters, confirms that the transition is first order. The beta phase corresponds to a GdFeO3-type perovskite structure.

Original languageEnglish
Article number027602
Number of pages4
JournalPhysical Review Letters
Volume102
Issue number2
DOIs
Publication statusPublished - 16 Jan 2009

Keywords

  • POLYCRYSTALLINE BIFEO3
  • NEUTRON-DIFFRACTION
  • MAGNETIC-PROPERTIES
  • TEMPERATURE
  • MULTIFERROICS

Fingerprint

Dive into the research topics of 'Ferroelectric-Paraelectric Transition in BiFeO3: Crystal Structure of the Orthorhombic β Phase'. Together they form a unique fingerprint.

Cite this