| Autor: |
Guo, A. R., Tu, C. -S., Tao, Ruiwu, Katiyar, R. S., Guo, Ruyan, Bhalla, A. S. |
| Zdroj: |
Ferroelectrics Letters Section; June 1996, Vol. 21 Issue: 3 p71-77, 7p |
| Abstrakt: |
The 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 substantially with increasing temperature due to high mobility of Cs+ ion. Transition to higher symmetry structure was noticed above 940K and the corresponding changes in the phonon spectra were observed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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