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Suppression of Spin Pumping between Ni80Fe20 and Cu by a Graphene Interlayer

Published

Author(s)

William J. Gannett, Mark W. Keller, Hans Nembach, Thomas J. Silva, Ann Chiaramonti Debay

Abstract

Abstract We compare ferromagnetic resonance measurements of Py (Ni80Fe20) films sputtered onto Cu(111) with and without a graphene (Gr) interlayer grown by chemical vapor deposition before Py deposition. We find the expected damping enhancement from spin pumping for the Py/Cu case and no detectable enhancement for the Py/Gr/Cu case. Since damping is sensitive to effects other than spin pumping, much of the paper is concerned with ensuring that neither Gr nor Py is significantly degraded by the sample preparation process. We attribute the suppression of spin pumping in Py/Gr/Cu to the large contact resistance of the Gr/Cu interface.
Citation
Journal of Applied Physics
Volume
117
Issue
21

Keywords

ferromagnetic resonance, spin current, contact resistance, spin transfer, spin torque, spintronics, magnetic damping

Citation

Gannett, W. , Keller, M. , Nembach, H. , Silva, T. and Chiaramonti Debay, A. (2015), Suppression of Spin Pumping between Ni80Fe20 and Cu by a Graphene Interlayer, Journal of Applied Physics, [online], https://doi.org/10.1063/1.4921425, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918127 (Accessed July 12, 2024)

Issues

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Created June 6, 2015, Updated October 12, 2021