Temperature Dependent Raman Scattering in CsTiOAsO4 Single Crystal
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ABSTRACTThe longitudinal (LO) and transverse (TO) A1 vibrational modes have been measured between 30-1200 cm−1 as a function of temperature (30–1240 K) for CsTiOAsO4 (CTA). The frequencies for all corresponding Raman components shifted to lower frequencies on increasing the temperature, however, there is no typical soft-mode like behavior observed in the measured frequency range. The relative intensities of the low frequency bands increase dramatically with increasing temperature due to high mobility of Cs+ ion. A higher symmetry structure taking place above 940K has been confirmed by changes in the phonon spectra.
2011 ◽
Vol 110-116
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pp. 170-176
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2012 ◽
Vol 36
(1)
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pp. 21-29
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1971 ◽
Vol 36
(4)
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pp. 527-537
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1994 ◽
Vol 269
(49)
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pp. 31047-31050
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