Raman scattering investigations of the low-temperature phase transition of NaNbO3

In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO3) ceramics at the antiferroelectric–ferroelectric phase studied by the Raman scattering technique over the temperature range 10–300 K. The spectral shape indicates that the phase transition occurs at 160 K on the c...

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Bibliographic Details
Published in:Journal of Raman spectroscopy 2006-12, Vol.37 (12), p.1442-1446
Main Authors: Lin, S. J., Chiang, D. P., Chen, Y. F., Peng, C. H., Liu, H. T., Mei, J. K., Tse, W. S., Tsai, T.-R., Chiang, H.-P.
Format: Article
Language:English
Subjects:
Cations
Ceramics
crystal growth
Heating
lattice vibrational modes
Octahedrons
Phase transformations
Raman scattering
sodium niobate (NaNbO3) ceramics
Spectra
Stretching
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Summary:In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO3) ceramics at the antiferroelectric–ferroelectric phase studied by the Raman scattering technique over the temperature range 10–300 K. The spectral shape indicates that the phase transition occurs at 160 K on the cooling cycle and at 260 K on heating. The recorded spectra are discussed following the separation of modes into the internal stretching modes of the NbO6 octahedron and Na+ cation translational modes. The 62 and 75 cm−1 peaks are proposed as the translational modes of Na+ cation against the NbO6 octahedron. Copyright © 2006 John Wiley & Sons, Ltd.
ISSN:0377-0486
1097-4555
DOI:10.1002/jrs.1598