Anharmonicity in fluoperovskites
- 29 February 1984
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 17 (6) , 1001-1007
- https://doi.org/10.1088/0022-3719/17/6/009
Abstract
From an experimental determination of the temperature and pressure dependence of the R25 soft-mode frequency in RbCaF3, KZnF3 and CsCaF3, it is shown that the overall temperature-dependent shift of the soft mode is mainly due to the self-energy (the purely anharmonic effect) whereas the quasi-harmonic contribution (the thermal expansion effect) is one order of magnitude lower.Keywords
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