Size-Dependent Properties of Multiferroic BiFeO3 Nanoparticles

BiFeO3 nanoparticles prepared by a modified Pechini method display strong size-dependent properties. The rhombohedral distortion from cubic structure is reduced by decreasing particle size accompanied by decreasing polarization inferred from atomic displacements found by Rietveld refinement of X-ray...

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Bibliographic Details
Published in:Chemistry of materials 2007-12, Vol.19 (26), p.6478-6484
Main Authors: Selbach, Sverre M, Tybell, Thomas, Einarsrud, Mari-Ann, Grande, Tor
Format: Article
Language:English
Subjects:
Electronic Materials
Magnetic Materials
Nanomaterials (Nanops, Nanotubes, etc.)
Online Access:Get full text
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Summary:BiFeO3 nanoparticles prepared by a modified Pechini method display strong size-dependent properties. The rhombohedral distortion from cubic structure is reduced by decreasing particle size accompanied by decreasing polarization inferred from atomic displacements found by Rietveld refinement of X-ray powder diffraction data. With decreasing crystallite size, the Néel temperature decreased and the magnetic transition was increasingly diffuse. The Néel temperature was shown to correlate with the volume of the crystallites and the polar displacements of cations.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm071827w