Sugimoto, S orcid.org/0000-0003-0212-2805, Rosamond, MC, Linfield, EH et al. (1 more author) (2016) Observation of spin-wave Doppler shift in Co₉₀Fe₁₀/Ru micro-strips for evaluating spin polarization. Applied Physics Letters, 109 (11). 112405. ISSN 0003-6951
Abstract
The current-induced spin-wave Doppler shift has been investigated for Co₉₀Fe₁₀ films, with and without under- and overlayers of Ru, aiming to obtain quantitative insights into the value of spin polarization of the diffusive electrical currents flowing in this material. This extends the use of spin-wave Doppler shift spectroscopy beyond the study of permalloy to other soft magnetic materials suitable for use in spintronic applications such as racetrack memories. The Damon-Eshbach spin-wave mode was employed, and a control experiment of permalloy yielded a value of spin polarization of P = 0.44 ± 0.03 for that material. An extended method to properly evaluate spin-wave Doppler shifts is developed that takes account of the non-negligible Oersted fields that are generated by the current density asymmetry caused by conducting under- or overlayers. The values of spin polarization for various Co₉₀Fe₁₀-based structures are found to lie in the range of 0.3–0.35, only slightly less than in permalloy.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Published by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Sugimoto, S, Rosamond, MC, Linfield, EH and Marrows, CH (2016) Observation of spin-wave Doppler shift in Co₉₀Fe₁₀/Ru micro-strips for evaluating spin polarization. Applied Physics Letters, 109 (11). 112405. ISSN 0003-6951, and may be found at https://doi.org/10.1063/1.4962835. 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 Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Funding Information: | Funder Grant number EU - European Union 627473 EPSRC EP/I000933/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Sep 2016 13:46 |
Last Modified: | 12 Dec 2024 14:36 |
Published Version: | https://doi.org/10.1063/1.4962835 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.4962835 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104352 |