A Raman study of silver tantalate (AgTaO3) and its structural phase transition sequence
- 30 March 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (9) , 1217-1230
- https://doi.org/10.1088/0022-3719/20/9/012
Abstract
Light scattering measurements in the temperature range from 10 to 775 K have been performed on single crystals of silver tantalate (AgTaO3). The results are compared with dielectric and X-ray investigations. The intensity distribution of the scattered light is analysed and discussed in terms of the sequence of structural phase transitions. The Raman spectrum displays important changes at 170 K on heating and at 120 K on cooling. This feature is the first clear evidence of an additional structural phase transition that is not evident from X-ray and dielectric measurements.Keywords
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