Mechanism of the 118.5K phase transition in PrAlO3
- 28 April 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (8) , L205-L208
- https://doi.org/10.1088/0022-3719/10/8/010
Abstract
A calculation is reported which strongly suggests that the 118.5K phase transition in PrAlO3 is due to coupling between an acoustic phonon and temperature dependent optic modes. Results of other calculations have indicated that the temperature dependence is caused by changing populations of the Pr3+ electronic energy levels. The nature of the structural changes at 118.5 is discussed.Keywords
This publication has 12 references indexed in Scilit:
- Microscopic order parameters in PrAlPhysical Review B, 1975
- Raman study of excitations in PrAlO3Journal of Physics C: Solid State Physics, 1975
- Cooperative Jahn-Teller phase transition in PrAlPhysical Review B, 1974
- Brillouin-Scattering Evidence for a New Phase Transition in Perovskite Crystals: PrAlPhysical Review Letters, 1974
- The phase transitions of PrAlO3Journal of Physics C: Solid State Physics, 1973
- Phase Transitions in Perovskitelike Compounds of the Rare EarthsPhysical Review B, 1970
- A qualitative X-ray diffraction study of the 205°K and 151°K phase transformations in praseodymium aluminate (PrAlO3)Journal of Applied Crystallography, 1970
- Interaction of Elastic Strain with the Structural Transition of Strontium TitanatePhysical Review B, 1970
- Raman Study of Trigonal-Cubic Phase Transitions in Rare-Earth AluminatesPhysical Review B, 1969
- Symmetry Considerations on Martensitic Transformations: "Ferroelectric" Metals?Physical Review Letters, 1965