In situ Raman spectroscopy of A-site doped barium titanate

Tools

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. [Article]

Abstract
More Information
Metrics
Share

[+][-]

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.

More Information

Official URL:

http://dx.doi.org/10.1063/1.2768881

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

Page Range:

062908

Identifiers

Identification Number:

10.1063/1.2768881

ORCID for Antonio Feteira: