Barker, C E A orcid.org/0000-0001-7266-3223, Finizio, S orcid.org/0000-0002-1792-0626, Haltz, E orcid.org/0000-0001-7133-9800 et al. (6 more authors) (2023) Domain wall motion at low current density in a synthetic antiferromagnet nanowire. Journal of Physics D: Applied Physics, 56 (42). 425002. ISSN 0022-3727
Abstract
The current-driven motion of magnetic domain walls (DWs) is the working principle of magnetic racetrack memories. In this type of spintronic technology, high current densities are used to propel DW motion in magnetic nanowires, causing significant wire heating that corresponds to wasted energy. Synthetic antiferromagnets are known to show very fast DW motion at high current densities, but lower current densities around onset of motion have received less attention. Here we use scanning transmission x-ray microscopy to study the response of DWs in a SAF multilayer to short current pulses. We observe that the DWs depin at $(3.5 \pm 0.4) \times 10^{11}$ A m−2 and move more quickly in response to 5 ns duration current pulses than in comparable multilayers that lack antiferromagnetic coupling. The results suggest that DWs in SAF structures are superior to conventional Néel DWs for low energy consumption racetrack technologies.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | spin torque, domain wall, synthetic antiferromagnet |
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 EPSRC (Engineering and Physical Sciences Research Council) EP/T006803/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Jul 2023 13:31 |
Last Modified: | 21 Jan 2025 14:18 |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1361-6463/ace6b4 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:201523 |
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Filename: E_A_Barker_2023_J._Phys._D__Appl._Phys._56_425002.pdf
Licence: CC-BY 4.0