Temperature dependence of the Raman frequencies and bandwidths close to phase transitions in ammonium halides
作者： H. Yurtseven
DOI: 10.1016/S0022-2860(01)00519-1
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摘要: Abstract In this study, we give the temperature dependence of our observed frequencies and bandwidths for Raman optical modes in ammonium halides close to phase transitions first order (NH 4 Br), tricritical Cl) second Cl). Using predictions an Ising pseudospin-phonon coupled model, which considers interactions between two spin phonons, data have been interpreted qualitatively. Our results show that model considered here can explain behaviour phonons near order, halides.
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