Calculation of the damping constant and the order parameter for the lattice mode in ferroelectric PbTiO3

2013-07-25
The temperature dependences of the damping constant and the order parameter are calculated for the lattice mode of E (1TO) in PbTiO3 using the experimental data by the pseudospin- phonon coupled model and the enrgy fluctuation model. Calculation of the damping constant of soft mode is performed in the temperature range of 400- 490 degrees C close to the ferroelectric- paraelectric transition (T-C= 493 degrees C) in PbTiO3. By relating the frequency to the order parameter, the temperature dependence of the Raman frequency for the E (1TO) mode is calculated in the ferroelectric phase of PbTiO3 using the molecular field theory.

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Citation Formats
A. Kiraci and H. H. Yurtseven, “Calculation of the damping constant and the order parameter for the lattice mode in ferroelectric PbTiO3,” 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53465.