Ababei, Razvan V., Ellis, Matthew O.A., Evans, Richard F.L. orcid.org/0000-0002-2378-8203 et al. (1 more author) (2019) Anomalous damping dependence of the switching time in Fe/FePt bilayer recording media. Physical Review B. 024427. ISSN 2469-9969
Abstract
Gilbert damping plays a significant role in magnetic reversal processes, and it determines the timescale of the switching. Here we investigate the properties of exchange-coupled composite media and the dependence of the switching time on the damping constant of the soft layer using atomistic spin dynamics. For a bilayer Fe/FePt medium, we find an anomalous increase of the switching time with increasing soft layer damping constant. The reversal occurs via a high-temperature exchange spring, and we show that the increase in the switching time is related to a corresponding increase in the time to establish the exchange spring. This phenomenon is delicately balanced in that the switching time increase occurs only in fields close to the coercivity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > York Institute for Materials Research The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 27 Feb 2019 14:20 |
Last Modified: | 16 Oct 2024 15:31 |
Published Version: | https://doi.org/10.1103/PhysRevB.99.024427 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevB.99.024427 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143067 |
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Filename: PhysRevB.99.024427.pdf
Description: Anomalous damping dependence of the switching time in Fe/FePt bilayer recording media