The lambda-phase transition in NH4Br


Yurtseven H., Gulec M., Sherman W.

PHASE TRANSITIONS, cilt.56, ss.137-146, 1996 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 56 Konu: 3
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1080/01411599608207842
  • Dergi Adı: PHASE TRANSITIONS
  • Sayfa Sayıları: ss.137-146

Özet

This study gives the predicted frequencies for the Raman modes of v(7)TA(56 cm(-1)), v(5)LO(177 cm(-1)) and v(2)(1684 cm(-1)) of NH4Br at various temperatures for zero pressure across the lambda-phase transition in this crystal system. We calculate the Raman frequencies by means of a constant mode Gruneisen parameter for each mode across the lambda-phase change region of NH4Br.