Almutairi, F. orcid.org/0009-0001-3168-6776, Alotaibi, M. orcid.org/0000-0003-1322-6992 and West, A.R. orcid.org/0000-0002-5492-2102 (2024) Flash luminescence, resistive switching and metal-insulator transitions in ceramic oxides. Acta Materialia, 276. 120003. ISSN 1359-6454
Abstract
A combination of voltage-induced, reversible OFF-ON resistive switching and electroluminescence is reported in two materials that are both mixed conductors of oxide ions and electron holes. This occurs at high temperatures, 450–700 °C in cubic, fluorite-structured hafnia, YxHf1-xO2-x/2 and at more modest temperatures, 200–300 °C in Ca-doped BiFeO3 with a cubic perovskite structure. In both cases, a small voltage in the range 2–40 V is applied across mm-thick ceramic samples. Both effects are influenced greatly by oxygen exchange with the surrounding atmosphere and involve a combination of electron injection at the cathode, hole injection at the anode and generation of internal pn junctions. There are strong similarities between these effects and flash sintering but without the significant sintering, thermoluminescence and Joule heating that may be observed with flash sintering.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Authors. Published by Elsevier Ltd on behalf of Acta Materialia Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Resistive switching; Flash luminescence; Oxide ion conductivity; Metal-insulator transition; Yttria-doped hafnia; Bismuth ferrite conductivity |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > School of Chemical, Materials and Biological Engineering |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 09 Jan 2025 15:50 |
Last Modified: | 09 Jan 2025 15:50 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.actamat.2024.120003 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:221424 |