Ferroelectric phase transitions in SrBi2Nb2O9 and Bi5Ti3FeO15: A powder neutron diffraction study

A Snedden, C H Hervoches, Philip Lightfoot

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100 Citations (Scopus)

Abstract

Structural phase transitions in the Aurivillius phase ferroelectrics SrBi2Nb2O9 and Bi5Ti3FeO15, containing two and four perovskite layers, respectively, have been studied using powder neutron diffraction. At temperatures below the ferroelectric Curie temperature both materials crystallize in the polar orthorhombic space group A2(1)am. On passing through T-C, both phases appear to transform directly to a tetragonal paraelectric phase, space group I4/mmm. This behavior contrasts with that of the analogs Sr0.85Bi2.1Ta2O9 and SrBi4Ti4O15, both of which have been shown unambiguously to transform via an intermediate paraelectric orthorhombic phase, space group Amam.

Original languageEnglish
Article number092102
Number of pages4
JournalPhysical Review. B, Condensed matter and materials physics
Volume67
Issue number9
DOIs
Publication statusPublished - 1 Mar 2003

Keywords

  • X-RAY
  • BI4TI3O12
  • FAMILY

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