Remarkable impact of low BiYbO3 doping levels on the local structure and phase transitions of BaTiO3

DELUCA, Marco, JLAIHAWI, Zaid, REICHMANN, Klaus, BELL, Anthony and FETEIRA, Antonio (2018). Remarkable impact of low BiYbO3 doping levels on the local structure and phase transitions of BaTiO3. Journal of Materials Chemistry A, 6 (13), 5443-5451.

[img] PDF
accepted_revised.pdf - Accepted Version
Restricted to Repository staff only until 15 March 2019.
All rights reserved.

Download (1MB)
[img] PDF
Feteira-RemarkableImpactOfLowBiYbO3(SuppMat).pdf - Supplemental Material
Restricted to Repository staff only until 15 March 2019.
All rights reserved.

Download (1MB)
Link to published version:: https://doi.org/10.1039/c7ta11096k

Abstract

In-situ Raman spectroscopy shows the simultaneous incorporation of small amounts of Bi3+ and Yb3+ into the lattice of BaTiO3 to break the average symmetry inferred from X-Ray powder diffraction analysis and permittivity measurements. In particular, Bi3+ with a stereochemically active lone-pair of electrons induces severe lattice strain and the coexistence of different local crystal symmetries over a wide temperature range, effectively controlling the physical properties, such as the temperature dependence of the permittivity and the Curie temperature. These results show that compositional gradients based in small variations of these two dopants could successfully explain the enhanced thermal stability of the permittivity in core-shell type ceramics, whereas the lower capacitance of the shell can also cap the maximum permittivity at the Curie temperature.

Item Type: Article
Departments: Faculty of Science, Technology and Arts > Engineering and Mathematics
Identification Number: https://doi.org/10.1039/c7ta11096k
Depositing User: Antonio Feteira
Date Deposited: 12 Feb 2018 11:36
Last Modified: 25 Jul 2018 04:55
URI: http://shura.shu.ac.uk/id/eprint/18634

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics