| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-902 - C6-904 | |
| DOI | https://doi.org/10.1051/jphyscol:19816268 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-902-C6-904
DOI: 10.1051/jphyscol:19816268
Nuclear Physics Division, Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India
J. Phys. Colloques 42 (1981) C6-902-C6-904
DOI: 10.1051/jphyscol:19816268
ANOMALOUS TEMPERATURE DEPENDENCE OF A LO MODE IN LiKSO4
M.L. Bansal, S.K. Deb, A.P. Roy et V.C. SahniNuclear Physics Division, Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India
Abstract
Raman scattering measurements for LiKSO4 over the temperature range 200 K to 725 K are reported. The results corroborate the occurrence of a phase transition at 700 K and also exhibit two unusual lattice dynamical features viz an invested LO-TO splitting and an increase in the frequency of a normal mode with rise in temperature. A phenomenological explanation for these features is given.