# Temperature Dependence of the Raman Frequency, Damping Constant and the Activation Energy of a Soft-Optic Mode in Ferroelectric Barium Titanate

@article{Kiraci2012TemperatureDO,
title={Temperature Dependence of the Raman Frequency, Damping Constant and the Activation Energy of a Soft-Optic Mode in Ferroelectric Barium Titanate},
author={Ali Kiraci and Hamit Yurtseven},
journal={Ferroelectrics},
year={2012},
volume={432},
pages={14 - 21}
}
• Published 1 January 2012
• Chemistry
• Ferroelectrics
The Raman frequency of a soft-optic mode associated with the order parameter is calculated as a function of temperature from the mean field theory for barium titanate (TC =222 K). Using the Raman frequencies calculated, the damping constant is evaluated and it is compared with the observed one for this soft-optic mode. Using the temperature dependence of the damping constant which is calculated from the pseudospin-phonon coupled model and from the energy fluctuation model, activation energies…
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