Chureemart, P., Evans, R. F.L. orcid.org/0000-0002-2378-8203, Chantrell, R. W. orcid.org/0000-0001-5410-5615 et al. (4 more authors) (2017) Hybrid Design for Advanced Magnetic Recording Media:Combining Exchange-Coupled Composite Media with Coupled Granular Continuous Media. Physical Review Applied. 024016.
Abstract
In order to enhance the performance of advanced granular recording media and understand the physics behind the mechanism of the reversal process, an atomistic spin-dynamics simulation is used to investigate theoretically the magnetic properties and the magnetization-reversal behavior for a composite media design. This model allows us to investigate the effect of the magnetostatic interaction and inter- and intralayer exchange coupling for a realistic system. The composite granular medium investigated consists of hard and soft composite layers in which the grains are well segregated with a continuous capping layer deposited to provide uniform exchange coupling. We present a detailed calculation aimed to reveal the reversal mechanism. In particular, the angular dependence of the critical field is investigated to understand the switching process. The calculations show a complex reversal mechanism driven by the magnetostatic interaction. It is also demonstrated, at high sweep rates consistent with the recording process, that thermal effects lead to a significant and irreducible contribution to the switching field distribution.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 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 > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 20 Sep 2017 11:45 |
Last Modified: | 08 Feb 2025 00:24 |
Published Version: | https://doi.org/10.1103/PhysRevApplied.8.024016 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevApplied.8.024016 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121470 |