DOI: 10.1063/1.4962835. Observation of spin-wave Doppler shift in Co90Fe10/Ru micro-strips for evaluating spin polarization

Observation of spin-wave Doppler shift in Co90Fe10/Ru micro-strips for evaluating spin polarization

10.1063/1.4962835

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

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.

Bibliography

Sugimoto, S., Rosamond, M. C., Linfield, E. H., & Marrows, C. H. (2016). Observation of spin-wave Doppler shift in Co90Fe10/Ru micro-strips for evaluating spin polarization. Applied Physics Letters, 109(11).

Authors 4

Satoshi Sugimoto (first)
Mark C. Rosamond (additional)
Edmund H. Linfield (additional)
Christopher H. Marrows (additional)

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Dates

Type	When
Created	8 years, 11 months ago (Sept. 16, 2016, 1 p.m.)
Deposited	2 years, 2 months ago (June 17, 2023, 7:50 p.m.)
Indexed	1 month ago (July 30, 2025, 7:08 a.m.)
Issued	8 years, 11 months ago (Sept. 12, 2016)
Published	8 years, 11 months ago (Sept. 12, 2016)
Published Online	8 years, 11 months ago (Sept. 16, 2016)
Published Print	8 years, 11 months ago (Sept. 12, 2016)

Funders 1

European Commission 10.13039/501100000780
Region: Europe
gov (National government)
Labels26
1. European Union
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11. Europskoj komisiji
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Awards1
1. 627473

BibTeX

@article{Sugimoto_2016, title={Observation of spin-wave Doppler shift in Co90Fe10/Ru micro-strips for evaluating spin polarization}, volume={109}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4962835}, DOI={10.1063/1.4962835}, number={11}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Sugimoto, Satoshi and Rosamond, Mark C. and Linfield, Edmund H. and Marrows, Christopher H.}, year={2016}, month=sep }

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