Electric field effect on Bi Fe O 3 single crystal investigatedby Raman spectroscopy

Micro-Raman spectroscopy has been used to study lattice dynamics associated with the ferroelectric domains of a Bi Fe O 3 single crystal at low temperature. The phonon assignment shows a large frequency splitting between the transverse and longitudinal components of the A 1 phonon mode related to th...

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Bibliographic Details
Published in:Applied physics letters 2007-08, Vol.91 (7), p.071910-071910-3
Main Authors: Cazayous, M., Malka, D., Lebeugle, D., Colson, D.
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Summary:Micro-Raman spectroscopy has been used to study lattice dynamics associated with the ferroelectric domains of a Bi Fe O 3 single crystal at low temperature. The phonon assignment shows a large frequency splitting between the transverse and longitudinal components of the A 1 phonon mode related to the Bi-O bonds in contrast with thin films where the splitting is negligible. Applying an external electric field induces frequency shifts of the low energy modes related to the Bi-O bonds. These softenings are due to a tensile stress via the piezoelectric effect. The authors give estimates of the phonon deformation potentials.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2771380