Bandwidths studied as a function of temperature in ammonium halides near T-lambda

Yurtseven, HASAN

doi:10.1016/j.saa.2005.01.030

Bandwidths studied as a function of temperature in ammonium halides near T-lambda

Atıf İçin Kopyala

Yurtseven H.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.62, ss.910-914, 2005 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 62
Basım Tarihi: 2005
Doi Numarası: 10.1016/j.saa.2005.01.030
Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.910-914
Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This study gives our analysis of the Raman bandwidths using the soft mode-hard mode coupling model applied to ammonium halides. The temperature dependence of our observed bandwidths for the nu(5)(174 cm(-1)) Raman mode of NH4Cl and nu(5)(177 cm(-1)) Raman mode of NH4Br, is analyzed close to phase transitions. From our analysis, we obtain beta = 0.13 as the values of the critical exponent for the order parameter in the first order phase region for the ammonium halides. (c) 2005 Elsevier B.V. All rights reserved.