Critical behaviour of the Raman frequency shifts in the vicinity of the lambda-phase transition in NH4Br
HIGH TEMPERATURE MATERIALS AND PROCESSES, vol.25, no.3, pp.143-147, 2006 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 25 Issue: 3
- Publication Date: 2006
- Journal Name: HIGH TEMPERATURE MATERIALS AND PROCESSES
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.143-147
- Middle East Technical University Affiliated: Yes
Abstract
This study gives the temperature dependence of the Raman frequencies for the lattice mode of upsilon(7) (TA) and the internal mode of upsilon(2) close to the X-phase transition (T-lambda=234K, P=\) in NB4Br.