Pascual-Gonzalez, C., Schileo, G., Khesro, A. et al. (4 more authors) (2017) Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO3–x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics. Journal of Materials Chemistry C, 5 (8). pp. 1990-1996. ISSN 2050-7534
Abstract
The band gap of (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 (0 ≤ x ≤ 0.25) ceramics narrows slightly from 3.22 eV for x = 0 to 2.89 eV for x = 0.25, in broad agreement with first-principles calculations [Phys. Rev. B, 2014, 89, 235105]. In addition, an unreported piezoelectric-to-electrostrictive crossover is observed in this compositional range, which is accompanied by a continuous decrease of the maximum electric field-induced strain due to the presence of a non-ferroelectric phase. An electrostriction coefficient of 0.023 m4 C−2 is measured for x = 0.05, whilst no electromechanical response is observed for non-ferroelectric x = 0.25, even under an applied electric field of 80 kV cm−1.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Royal Society of Chemistry. This is an author produced version of a paper subsequently published in JOURNAL. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 May 2017 08:34 |
Last Modified: | 24 Jan 2018 01:38 |
Published Version: | https://www.doi.org/10.1039/c6tc05515j |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Identification Number: | 10.1039/c6tc05515j |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115529 |