Anomalous Increase in Spectral Intensity of Soft-Mode Raman Scattering near the Temperature of the Ferroelectric Phase Transition in Lithium Tantalate Crystals

2020 ◽  
Vol 28 (3) ◽  
pp. 241-249
Author(s):  
V. S. Gorelik ◽  
A. Yu. Pyatyshev
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Soft Mode ◽  
Lithium Tantalate ◽  
Spectral Intensity ◽  
Anomalous Increase

The Nature of Soft Mode and Ferroelectric Phase Transition in SbOxS1−xI and SbSexS1−xI Mixed Crystals

2004 ◽  
Vol 31 (5-6) ◽  
pp. 113-118 ◽  
Author(s):  
A. AUDZIJONIS ◽  
L. ŽIGAS ◽  
G. GAIGALAS ◽  
V. PAULIKAS ◽  
R. ŽALTAUSKAS ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Soft Mode ◽  
Mixed Crystals

Raman scattering study of the ferroelectric phase transition in tris-sarcosine calcium chloride (tscc)

1980 ◽  
Vol 72 (1) ◽  
pp. 119-121 ◽  
Author(s):  
Louis-Claude Brunel ◽  
Jean-Claude Bureau ◽  
Siegfried Wartewig ◽  
Wolfgang Windisch
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Calcium Chloride ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Scattering Study

Determination of the A1(TO) soft-mode damping rate in KTa0.93Nb0.07O3

1994 ◽  
Vol 72 (1-2) ◽  
pp. 40-43 ◽  
Author(s):  
P. Grenier ◽  
D. Houde ◽  
S. Jandl ◽  
L. A. Boatner
Keyword(s):  
Raman Scattering ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Soft Mode ◽  
Stimulated Raman Scattering ◽  
Ferroelectric Phase Transition Temperature ◽  
Damping Rate ◽  
Additional Interaction ◽  
Impulsive Stimulated Raman Scattering

Raman-scattering and infrared reflectivity experiments were conducted using a KTa0.93Nb0.07O3 single crystal with a ferroelectric phase transition temperature of Tc ≈ 68 K. The values obtained for the damping rate of the A1(TO(transverse optical)) soft-mode appear to be half of those determined by impulsive stimulated Raman scattering. Since the latter experiment probes the soft-mode in the polariton regime, while the former probes outside of this region, the observed discrepancy points towards some additional interaction for the polariton soft-mode.

Soft-mode Dynamics in the Ferroelectric Phase Transition of Quantum Paraelectric SrTiO3

2009 ◽  
Vol 379 (1) ◽  
pp. 168-176 ◽  
Author(s):  
Toshirou Yagi ◽  
Masaki Takesada ◽  
Hiroki Taniguchi ◽  
Mitsuru Itoh
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Soft Mode ◽  
Quantum Paraelectric

Raman scattering study of the ferroelectric phase transition in BaTi2O5

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
Shinya Tsukada ◽  
Yasuhiro Fujii ◽  
Yasuhiro Yoneda ◽  
Hiroki Moriwake ◽  
Ayako Konishi ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Scattering Study
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