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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/615

Title: Raman scattering spectra and ferroelectric properties of Bi[sub 1-x]Nd[sub x]FeO₃ (x=0-0.2) multiferroic ceramics
Authors: Yuan, G. L.
Or, Derek Siu-wing
Chan, Helen L. W.
Subjects: Bismuth compounds
Neodymium compounds
Multiferroics
Ferroelectric ceramics
Crystal structure
Raman spectra
X-ray diffraction
Ferroelectric transitions
Bonds (chemical)
Issue Date: 16-Mar-2007
Publisher: American Institute of Physics
Citation: Journal of applied physics, 16 Mar. 2007, v. 101, no. 6, 064101, p. 1-5.
Abstract: Single-phase Bi[sub 1−x]Nd[sub x]FeO₃ (BNFO[sub x])(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 BNFO[sub x=0.175] and BNFO[sub x=0.2] was 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.
Rights: © 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in G.L. Yuan, S.W. Or, and H.L.W. Chan, J. Appl. Phys. 101, 064101 (2007) and may be found at http://link.aip.org/link/?jap/101/064101.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/615
ISSN: 00218979
Appears in Collections:AP Journal/Magazine Articles

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