Pressure Dependence of Acoustic-Mode-Soft-Optic-Mode Interactions in Ferroelectric BaTi
- 1 October 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 6 (7) , 2748-2751
- https://doi.org/10.1103/physrevb.6.2748
Abstract
Measurements of the pressure dependence of the Raman and Brillouin spectra of tetragonal BaTi at 296 K have shown that the frequency separation between the two branches of the coupled acoustic-mode-soft-optic-mode system increases and the mode coupling decreases with increasing pressure. The results yield independent quantitative support for the model recently discussed by Fleury and Lazay and demonstrate the utility of pressure studies as a unique means of investigating coupled-mode interactions.
Keywords
This publication has 8 references indexed in Scilit:
- On the relationship between ionic displacement and the curie temperature and spontaneous polarization in displacive ferroelectricsFerroelectrics, 1971
- Pressure and temperature dependence of the dielectric properties and phase transitions of the ferroelectric perovskites: PbTiO3 and BaTiO3Ferroelectrics, 1971
- The gruneisen parameter of the softferroelectric mode in the cubic perovskites†Ferroelectrics, 1971
- Acoustic—Soft-Optic Mode Interactions in Ferroelectric BaTiPhysical Review Letters, 1971
- Mixing of Acoustic and Soft Optic Modes in Ferroelectric BaTiPhysical Review B, 1968
- INTERACTION OF ACOUSTIC WAVES WITH POLARIZATION WAVES IN FERROELECTRICSCanadian Journal of Physics, 1967
- Evidence from Raman Scattering for an Overdamped Soft Optic Mode in BaTiPhysical Review Letters, 1967
- Temperature Dependence of the Dielectric Constant of Paraelectric MaterialsPhysical Review B, 1963