The role of local non-tetragonal polar displacements in the temperature- and pressure-induced phase transitions in PbTiO3-BiMeO3 ferroelectrics

In situ high-pressure/high-temperature Raman-scattering analyses on PbTiO 3 , 0.92PbTiO 3 - 0.08Bi(Zn 0.5 Ti 0.5 )O 3 and 0.83PbTiO 3 - 0.17Bi(Mg 0.5 Ti 0.5 )O 3 single crystals reveal an intensity transfer between the fine-structure components of the A 1 (TO) soft mode. The enhancement of the lowes...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2024-03, Vol.14 (1), p.7106-8, Article 7106
Main Authors: Margaritescu, Irina, Liu, Zenghui, Ye, Zuo-Guang, Mihailova, Boriana
Format: Article
Language:English
Subjects:
639/766/119/2795
639/766/119/996
Crystals
Energy
Ferroelectrics
High temperature
Humanities and Social Sciences
multidisciplinary
Phase transitions
Pressure
Science
Science (multidisciplinary)
Single crystals
Solid solutions
Temperature
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In situ high-pressure/high-temperature Raman-scattering analyses on PbTiO 3 , 0.92PbTiO 3 - 0.08Bi(Zn 0.5 Ti 0.5 )O 3 and 0.83PbTiO 3 - 0.17Bi(Mg 0.5 Ti 0.5 )O 3 single crystals reveal an intensity transfer between the fine-structure components of the A 1 (TO) soft mode. The enhancement of the lowest-energy subpeak, which stems from intrinsic local non-tetragonal polar distortions, along with the suppression of the tetragonal A 1 (1TO) fundamental mode with increasing pressure and temperature indicates the key role of the local polarization fluctuations in transformation processes and emphasizes the significance of the order-disorder phenomena in both the pressure- and temperature-induced phase transitions of pure PbTiO 3 and its solid solutions with complex perovskites. Moreover, the temperature and pressure evolution of the fraction of the local non-tetragonal polar distortions is highly sensitive to the type of B-site substituent.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-57765-w