Raman scattering investigations of the low‐temperature phase transition of NaNbO 3
Abstract In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO 3 ) 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...
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Published in | Journal of Raman spectroscopy Vol. 37; no. 12; pp. 1442 - 1446 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.12.2006
|
Online Access | Get full text |
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Summary: | Abstract
In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO
3
) 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 NbO
6
octahedron and Na
+
cation translational modes. The 62 and 75 cm
−1
peaks are proposed as the translational modes of Na
+
cation against the NbO
6
octahedron. Copyright © 2006 John Wiley & Sons, Ltd. |
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ISSN: | 0377-0486 1097-4555 |
DOI: | 10.1002/jrs.1598 |