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.

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Link to published version:: https://doi.org/10.1039/c7ta11096k
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    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 - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
    Identification Number: https://doi.org/10.1039/c7ta11096k
    Page Range: 5443-5451
    Depositing User: Antonio Feteira
    Date Deposited: 12 Feb 2018 11:36
    Last Modified: 15 Mar 2019 08:00
    URI: http://shura.shu.ac.uk/id/eprint/18634

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