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

doi:10.1063/1.2433709

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

Research output: Journal article publication › Journal article › Academic research › peer-review

177 Citations (Scopus)

Abstract

Single-phase Bi_1-xNd_xFeO₃ (BNFO _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 _x=0.175 and BNFO_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.

Original language	English
Article number	064101
Journal	Journal of Applied Physics
Volume	101
Issue number	6
DOIs	https://doi.org/10.1063/1.2433709
Publication status	Published - 8 Apr 2007

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.2433709

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@article{ed39e6e2527542f19ab5da55adf84a04,

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

abstract = "Single-phase Bi1-xNdxFeO3 (BNFO 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 x=0.175 and BNFOx=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.",

author = "Yuan, \{G. L.\} and Or, \{Siu Wing\} and Chan, \{Helen Lai Wa\}",

note = "Funding Information: This work was supported by the Research Grants Council of the HKSAR Government under Grant Nos. PolyU 5255/03E and PolyU 5122/05E.",

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doi = "10.1063/1.2433709",

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publisher = "American Institute of Physics",

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T1 - Raman scattering spectra and ferroelectric properties of Bi 1-xNdxFeO3 (x= 0-0.2) multiferroic ceramics

AU - Yuan, G. L.

AU - Or, Siu Wing

AU - Chan, Helen Lai Wa

N1 - Funding Information: This work was supported by the Research Grants Council of the HKSAR Government under Grant Nos. PolyU 5255/03E and PolyU 5122/05E.

PY - 2007/4/8

Y1 - 2007/4/8

N2 - Single-phase Bi1-xNdxFeO3 (BNFO 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 x=0.175 and BNFOx=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.

AB - Single-phase Bi1-xNdxFeO3 (BNFO 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 x=0.175 and BNFOx=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.

UR - https://www.scopus.com/pages/publications/34047158649

U2 - 10.1063/1.2433709

DO - 10.1063/1.2433709

M3 - Journal article

SN - 0021-8979

VL - 101

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 6

M1 - 064101

ER -

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

Abstract

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