Temperature dependence of the Raman bandwidths for the lattice and internal modes in ammonium halides close to the lambda-phase transitions

Date

2008-07-01

Author

Yurtseven, Hasan Hamit
Tuzer, T. U.

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We study here the temperature dependence of our Raman bandwidths for the upsilon(5) lattice modes of NH4Cl (T-lambda = 241 K) and NH4Br (T-lambda = 235 K) and for the upsilon(2) internal mode of NH4Cl close to the lambda-phase transitions.

Subject Keywords

Raman bandwidths, Ammonium halides, Lambda transition, ORDER-DISORDER TRANSITION, WEAKLY FIRST-ORDER, SINGLE-CRYSTALS, HEAT-CAPACITY, T-LAMBDA, NH4BR, NH4CL, PRESSURE, BROMIDE, FREQUENCY

URI

https://hdl.handle.net/11511/33363

Journal

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

DOI

https://doi.org/10.1016/.j.saa.2007.11.030

Collections

Department of Physics, Article

Citation Formats

H. H. Yurtseven and T. U. Tuzer, “Temperature dependence of the Raman bandwidths for the lattice and internal modes in ammonium halides close to the lambda-phase transitions,” SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol. 70, no. 2, pp. 445–448, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33363.