Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5025867 | Optik - International Journal for Light and Electron Optics | 2017 | 25 Pages |
Abstract
We find that the order parameter (Raman frequency of the TO1 mode) and the inverse dielectric susceptibility decrease with increasing temperature, as expected from the mean field model. We also find that the damping constant and the inverse relaxation time of this soft mode increases and decreases, respectively, with increasing temperature on the basis of the two models studied in the ferroelectric phase of LiNbO3. This indicates that our method of calculation is satisfactory to describe the observed behaviour of the ferroelectric-paraelectric phase transition in LiNbO3.
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Authors
A. Kiraci, H. Yurtseven,