Temperature dependence of the Raman spectra of NaClO4 in relation to the 581 K phase transition
β Scribed by N. Toupry-Krauzman; H. Poulet
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 392 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0377-0486
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## Abstract Raman spectra of molten Sm~0.8~La~0.2~AlO~3~ have been recorded from room temperature to 1470 K. Experimental results show that a firstβorder phase transition occurs at 580 K and that two phonon modes appear very unstable in the high temperature phase. Comparison with Raman data obtaine
## Abstract In this work, we report the lowβtemperature phase transition of sodium niobate (NaNbO~3~) ceramics at the antiferroelectricβferroelectric phase studied by the Raman scattering technique over the temperature range 10β300 K. The spectral shape indicates that the phase transition occurs at