Spin transport across the interface in ferromagnetic/nonmagnetic systems

Swindells, C; Hindmarch, A.T.; Gallant, A.J.; Atkinson, D.

doi:10.1103/physrevb.99.064406

Spin transport across the interface in ferromagnetic/nonmagnetic systems

Swindells, C; Hindmarch, A.T.; Gallant, A.J.; Atkinson, D.

Authors

C Swindells

Dr Aidan Hindmarch a.t.hindmarch@durham.ac.uk
Associate Professor

Professor Andrew Gallant a.j.gallant@durham.ac.uk
Professor

Professor Del Atkinson del.atkinson@durham.ac.uk
Professor

Abstract

Understanding interfacial spin transport is key to developing magnetoelectonic devices, however, the exact nature of the parameters involved is unclear. Here, we report a detailed ferromagnetic resonance-based spintransport analysis on a variety of structures of both ferromagnetic (Co, CoFeB) and heavy metal layers (Pt, Ru) in order to fully quantify the interfacial spin-transport parameters. Enhanced spin-mixing conductance is observed for more closely matched ferromagnet and heavy metal crystal structures, and, significantly, the inclusion of a thickness-dependent spin-diffusion length gives a bulk value of 9.4 ± 0.7 nm for Pt, resolving reported discrepancies.

Citation

Swindells, C., Hindmarch, A., Gallant, A., & Atkinson, D. (2019). Spin transport across the interface in ferromagnetic/nonmagnetic systems. Physical Review B, 99(6), Article 064406. https://doi.org/10.1103/physrevb.99.064406

Journal Article Type	Article
Acceptance Date	Jan 24, 2019
Online Publication Date	Feb 5, 2019
Publication Date	Feb 5, 2019
Deposit Date	Jan 25, 2019
Publicly Available Date	Feb 6, 2019
Journal	Physical Review B
Print ISSN	2469-9950
Electronic ISSN	2469-9969
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	99
Issue	6
Article Number	064406
DOI	https://doi.org/10.1103/physrevb.99.064406

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Copyright Statement
Reprinted with permission from the American Physical Society: Swindells, C, Hindmarch, A. T. , Gallant, A. J. & Atkinson, D. (2019). Spin transport across the interface in ferromagnetic/nonmagnetic systems Status. Physical Review B 99(6): 064406 © 2019 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.