Wood, JM, Oseghale, CI, Cespedes, O orcid.org/0000-0002-5249-9523 et al. (2 more authors) (2018) Control of ferromagnetic properties of Ni₈₀Fe₂₀ thin films by voltage-induced oxidation. Journal of Applied Physics, 124 (8). ARTN 085304. ISSN 0021-8979
Abstract
We demonstrate large voltage-induced changes of magnetic properties in thin films of Ni₈₀Fe₂₀(permalloy) when gated using an ionic liquid medium [1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIMTFSI)]. The coercivity and magnetic moment of 5 nm thick permalloy films could be reduced by 75% and 35%, respectively, by using applied voltages. These changes were partially restored by reversing the potential polarity. Electrochemical, time-course magnetometry and surface analysis measurements suggest that the voltage-induced changes are due to changes in the oxidation state at the surface of the film, causing a thinning of the permalloy layer. The control of soft magnetic properties with low voltages may be of use in tuneable devices.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Published by AIP Publishing. This paper is published in the Journal of Applied Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 27 Nov 2018 10:30 |
Last Modified: | 24 Aug 2019 00:42 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.5045552 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:138966 |