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- Title
High pressure effects on ferroelectric tetragonal phase in BaTi1−xFe<sub>x</sub>O<sub>3</sub> (x=1%).
- Authors
Tran, T. A.; Tran, T. K. C.; Nguyen, L. V. T.; Khan, D. T.; Truong-Son, L. V.; Thao, L. T. P.; Truong, V. C.; Thanh-Nghiem, N.; Phuc, H. T.; Jabarov, S. H.; Tien, D. P. T.
- Abstract
The pressure-driven phase transformation in polycrystalline BaTi 1 − x FexO3 (x = 1 %), synthesized by a solid-state reaction method, was investigated using synchrotron X-ray diffraction and Raman spectroscopy. All measurements were performed at room temperature within a large pressure range up to 36.5 GPa. The results clearly demonstrate a phase transformation from the ferroelectric tetragonal structure of P4mm symmetry to the paraelectric cubic structure of Pm-3m symmetry in the studied sample at the pressure of about 18 GPa. This phase transformation pressure is much higher than those previously reported for BaTiO3-based systems, indicating the stabilization of the ferroelectric phase by doping 1% Fe into BaTiO3. Feature modes of the tetragonal phase still persist while some new modes appear in the Raman spectra at pressures above 18 GPa. This is probably due to accumulated stress and/or local microscopic disorders in the sample, which are associated with the displacement of the Ti atoms along unit-cell diagonals.
- Subjects
FERROELECTRICITY; PHASE transitions; FERROELECTRIC polymers; RAMAN spectroscopy; X-ray diffraction
- Publication
Modern Physics Letters B, 2024, Vol 38, Issue 1, p1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984923502068