Lu, Xianyang, Atkinson, Lewis Jack, Kuerbanjiang, Balati orcid.org/0000-0001-6446-8209 et al. (10 more authors) (2019) Enhancement of intrinsic magnetic damping in defect-free epitaxial Fe3O4 thin films. Applied Physics Letters. 192406. 192406-1 to 192406-5. ISSN 0003-6951
Abstract
We have investigated the magnetic damping of precessional spin dynamics in defect-controlled epitaxial grown Fe3O4(111)/Yttria-stabilized Zirconia nanoscale films by all-optical pump-probe measurements. The intrinsic damping constant of the defect-free Fe3O4 film is found to be strikingly larger than that of the as-grown Fe3O4 film with structural defects. We demonstrate that the population of the first-order per- pendicular standing spin wave (PSSW) mode, which is exclusively observed in the defect-free film under sufficiently high external magnetic fields, leads to the enhancement of the magnetic damping of the uniform precession (Kittel) mode. We propose a physical picture in which the PSSW mode acts as an additional channel for the extra energy dissipation of the Kittel mode. The energy transfer from the Kittel mode to the PSSW mode increases as in-plane magnetization precession becomes more uniform, resulting in the unique intrinsic magnetic damp- ing enhancement in the defect-free Fe3O4 film.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 AIP Publishing LLC. 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. |
Keywords: | Intrinsic magnetic damping, ,,epitaxial Fe3O4 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 21 May 2019 11:40 |
Last Modified: | 25 Nov 2024 00:32 |
Published Version: | https://doi.org/10.1063/1.5091503 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1063/1.5091503 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146344 |