Raman scattering spectra and ferroelectric properties of Bi 1-xNdxFeO3 (x= 0-0.2) multiferroic ceramics

G. L. Yuan, Siu Wing Or, Helen Lai Wa Chan

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140 Citations (Scopus)

Abstract

Single-phase Bi1-xNdxFeO3(BNFOx) (x=0-0.2) multiferroic ceramics were prepared to study the effects of Nd substitution on their crystal structures, Raman scattering spectra, and ferroelectric properties. Rietveld refinement of x-ray diffraction data showed a gradual change in crystal structure from rhombohedral to pseudotetragonal via triclinic with increasing x. The evolvement of Raman normal modes with increasing x suggested that such structural change is accompanied by the weakening of long-range ferroelectric order. The simultaneous occurrence of abrupt mode evolvement and ferroelectric-paraelectric transition in BNFOx=0.175and BNFOx=0.2was explained according to the change of Bi-O covalent bonds as a result of the decline in the stereochemical activity of the Bi lone electron pair at 0.175≤x≤0.2.
Original languageEnglish
Article number064101
JournalJournal of Applied Physics
Volume101
Issue number6
DOIs
Publication statusPublished - 8 Apr 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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