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Spin transport across the interface in ferromagnetic/nonmagnetic systems.

Swindells, C and Hindmarch, A. T. and Gallant, A. J. and Atkinson, D. (2019) 'Spin transport across the interface in ferromagnetic/nonmagnetic systems.', Physical review B., 99 (6). 064406.


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.

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Publisher 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.
Date accepted:24 January 2019
Date deposited:06 February 2019
Date of first online publication:05 February 2019
Date first made open access:06 February 2019

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