Li, Y orcid.org/0000-0002-4980-1592, Borbely, M and Bell, A orcid.org/0000-0002-2061-3862 (2021) The Influence of Oxygen Vacancies on Piezoelectricity in Samarium‐Doped Pb(Mg₁/₃Nb₂/₃)O₃‐PbTiO₃ Ceramics. Journal of the American Ceramic Society, 104 (6). pp. 2678-2688. ISSN 0002-7820
Abstract
A study of 0.71Pb(Mg1/3Nb2/3)O3‐0.29PbTiO3 shows that, when it is doped with 2.5% Sm on the A‐site, in addition to an almost 3‐fold increase in piezoelectric charge coefficient and dielectric permittivity, there is a 2 order of magnitude reduction in conductivity, attributed to a decrease in oxygen vacancy concentration. An analysis of the nonlinearity of permittivity with respect to field amplitude shows that both the reversible and irreversible contributions increase significantly with Sm‐doping, with simple models showing that these changes are consistent with a reduction in the concentration of dipolar defects that can inhibit both polarization rotation and domain wall translation. Contrary to the argument that doping increases heterogeneity, there is little change in the diffuseness of the peak in permittivity as a function temperature, whilst there is a 15% increase in spontaneous polarization with Sm addition. Through comparison of the Rayleigh law parameters with those published for other piezoelectric materials, it is concluded that a significant contribution to the observed increase in piezoelectric performance due to Sm‐doping of PMN‐PT is similar in origin to that seen in soft, donor‐doped PZT and other conventional piezoelectric ceramics.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. All rights reserved. This is the peer reviewed version of the following article: Li, Y , Borbely, M and Bell, A (2021) The Influence of Oxygen Vacancies on Piezoelectricity in Samarium‐Doped Pb(Mg₁/₃Nb₂/₃)O₃‐PbTiO₃ Ceramics. Journal of the American Ceramic Society, 104 (6). pp. 2678-2688. ISSN 0002-7820, which has been published in final form at https://doi.org/10.1111/jace.17619. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
Keywords: | domains; oxygen vacancies; piezoelectricity; ferroelectricity |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Jan 2021 13:13 |
Last Modified: | 25 Jul 2022 15:00 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1111/jace.17619 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169625 |