Add to ORKGThe 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
A complete study of the k=0 optical phonons of the ferroelectric tetragonal PbTiO3 as a function of ...
The Raman frequency of the coupled mode omega_ associated with the order parameter is calculated as ...
The temperature dependence of the damping constant is calculated below the transition temperature (T...
The damping constant for the tetragonal Raman peak at 308cm(-1) is calculated as a function of tempe...
Frequencies, damping constants and the relaxation times of some Raman modes including the two soft m...
In this thesis we investigated the dynamical properties of some ferroelectric crystals and ceramics ...
We calculate the pressure dependence of the Raman frequencies of some Raman modes by using the obser...
We report the displacive and order-disorder characters of PbTiO3 analyzed using a classical atomic m...
International audienceHyper-Raman scattering experiments allowed collecting the spectra of the lowes...
The temperature dependence of the phonon frequency omega(ph) and of the damping constant Gamma(sp) d...
The temperature dependence of the Brillouin frequency and the linewidth of the LA mode is studied fo...
The origin of the anomalous line shape of the A(1)(1TO) soft mode in PbTiO3-based single crystals wa...
Lattice dynamical formalism using rigid ion model with long range coulomb forces and short range axi...
We have quantitatively measured the temperature dependence of the local distortions of PbTiO 3 cryst...
We have quantitatively measured the temperature dependence of the local distortions of PbTiO3, cryst...
A complete study of the k=0 optical phonons of the ferroelectric tetragonal PbTiO3 as a function of ...
The Raman frequency of the coupled mode omega_ associated with the order parameter is calculated as ...
The temperature dependence of the damping constant is calculated below the transition temperature (T...
The damping constant for the tetragonal Raman peak at 308cm(-1) is calculated as a function of tempe...
Frequencies, damping constants and the relaxation times of some Raman modes including the two soft m...
In this thesis we investigated the dynamical properties of some ferroelectric crystals and ceramics ...
We calculate the pressure dependence of the Raman frequencies of some Raman modes by using the obser...
We report the displacive and order-disorder characters of PbTiO3 analyzed using a classical atomic m...
International audienceHyper-Raman scattering experiments allowed collecting the spectra of the lowes...
The temperature dependence of the phonon frequency omega(ph) and of the damping constant Gamma(sp) d...
The temperature dependence of the Brillouin frequency and the linewidth of the LA mode is studied fo...
The origin of the anomalous line shape of the A(1)(1TO) soft mode in PbTiO3-based single crystals wa...
Lattice dynamical formalism using rigid ion model with long range coulomb forces and short range axi...
We have quantitatively measured the temperature dependence of the local distortions of PbTiO 3 cryst...
We have quantitatively measured the temperature dependence of the local distortions of PbTiO3, cryst...
A complete study of the k=0 optical phonons of the ferroelectric tetragonal PbTiO3 as a function of ...
The Raman frequency of the coupled mode omega_ associated with the order parameter is calculated as ...
The temperature dependence of the damping constant is calculated below the transition temperature (T...