HIGH TEMPERATURE MATERIALS AND PROCESSES, cilt.25, sa.3, ss.143-147, 2006 (SCI-Expanded)
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.