Behavior of Optical Phonons near the Diffuse Phase Transition in Relaxor Ferroelectric PbMg1/3Ta2/3O3
S.G. Lushnikov, S.N. Gvasaliya, and R.S. Katiyar
TL;DR
This study investigates how optical phonons behave near the diffuse phase transition in relaxor ferroelectric PbMg1/3Ta2/3O3, revealing anomalies in Raman scattering linked to dielectric response changes.
Contribution
It provides new insights into the temperature-dependent behavior of Raman-active phonons in relaxor ferroelectrics near phase transitions.
Findings
Anomalous temperature dependence of Raman line intensities and contours.
Correlation between Raman anomalies and dielectric dispersion.
Raman line distortions observed with decreasing temperature.
Abstract
Raman scattering in relaxor ferroelectric PbMg1/3Ta2/3O3 (PMT) was investigated in the single crystalline form in the temperature range of 20 - 295 K. Anomalous temperature dependence of the integrated intensity and the Raman line contours were found at the diffuse phase transition. A correlation between the anomalies in the integrated intensities and the dispersion of the dielectric response was observed. The distortions of Raman lines with decreasing temperature are discussed.
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