Raimondo, E, Saugar, E, Barker, J orcid.org/0000-0003-4843-5516 et al. (7 more authors) (2022) Temperature-gradient-driven magnetic skyrmion motion. Physical Review Applied, 18 (2). 024062. ISSN 2331-7019
Abstract
The static and dynamic properties of skyrmions have recently received increased attention due to the potential application of skyrmions as information carriers and for unconventional computing. While the current-driven dynamics has been explored deeply, both theoretically and experimentally, the theory of temperature gradient-induced dynamics—skyrmion caloritronics—is still at its early stages of development. Here, we move the topic forward by identifying the role of entropic torques due to the temperature dependence of magnetic parameters. Our results show that skyrmions move towards higher temperatures in single-layer ferromagnets with interfacial Dzyaloshinski-Moriya interactions, whereas, in multilayers, they move to lower temperatures. We analytically and numerically demonstrate that the opposite behaviors are due to different scaling relations of the material parameters as well as a non-negligible magnetostatic field gradient in multilayers. We also find a spatially dependent skyrmion Hall angle in multilayers hosting hybrid skyrmions due to variations of the thickness-dependent chirality as the skyrmion moves along the temperature gradient.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 American Physical Society. This is an author produced version of an article published in Physical Review Applied. 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) |
Funding Information: | Funder Grant number Royal Society RF\ERE\210314 |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Aug 2022 15:10 |
Last Modified: | 08 Sep 2022 13:19 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevApplied.18.024062 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:189958 |