Molecular-dynamics study of successive phase transitions in potassium selenate
โ Scribed by Etxebarria, I.; Lynden-Bell, R. M.; Perez-Mato, J. M.
- Book ID
- 126816678
- Publisher
- The American Physical Society
- Year
- 1992
- Tongue
- English
- Weight
- 480 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1098-0121
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H spin lattice relaxation study in the temperature range 439-77 K has been carried out in dimethyl ammonium (DMA) hexabromo selenate. A high temperature phase transition is observed as a dip in T 1 around 360 K, followed by a slope change at 222 K, and a discontinuous jump in T 1 at 154 K, which are
Raman spectroscopy as a useful tool to study ferroic phase transitions is presented. Deuterated analogue of b-LiNH 4 SO 4 and Rb 3 H(SeO 4 ) 2 , representatives of ferroic materials, were chosen for temperature Raman studies. Characteristic changes of external and internal modes of SO 4 and SeO 4 en