PASHA, U. M., ZHENG, H., THAKUR, O. P., FETEIRA, Antonio, WHITTLE, K. R., SINCLAIR, D. C. and REANEY, I. M. (2007). In situ Raman spectroscopy of A-site doped barium titanate. Applied Physics Letters, 91 (6), 062908.
Full text not available from this repository.Abstract
Raman spectroscopy has been used to study the ferroelectric tetragonal to paraelectric cubic phase transition Tc in undoped BaTiO3 (BT) and (Ba0.92A0.08)TiO3 [where A = Ca (BCT), Sr (BST), and Pb (BPT)]. In BT and BPT, mode characteristic of the tetragonal phase at 303 and 710 cm−1 persisted until >50 °C above Tc, indicating the presence of local dynamic polar clusters well above the displacive phase transitions, ∼ 120 and ∼ 149 °C, respectively. However, in BCT and BST, the Raman spectra exhibited only broad second order bands above Tc, suggesting that Ca and Sr, A-site dopants supress local dynamic polar clusters.
Item Type: | Article |
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Research Institute, Centre or Group - Does NOT include content added after October 2018: | Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology |
Identification Number: | https://doi.org/10.1063/1.2768881 |
Page Range: | 062908 |
Depositing User: | Hilary Ridgway |
Date Deposited: | 06 Jun 2012 15:02 |
Last Modified: | 18 Mar 2021 09:45 |
URI: | https://shura.shu.ac.uk/id/eprint/5332 |
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