Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films

Tokaç, M.; Bunyaev, S.A.; Kakazei, G.N.; Schmool, D.S.; Atkinson, D.; Hindmarch, A.T.

doi:10.1103/physrevlett.115.056601

Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films

Tokaç, M.; Bunyaev, S.A.; Kakazei, G.N.; Schmool, D.S.; Atkinson, D.; Hindmarch, A.T.

Authors

M. Tokaç

S.A. Bunyaev

G.N. Kakazei

D.S. Schmool

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

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

Abstract

Enhancement of Gilbert damping in polycrystalline cobalt thin-film multilayers of various thicknesses, overlayered with copper or iridium, was studied in order to understand the role of local interface structure in spin pumping. X-ray diffraction indicates that cobalt films less than 6 nm thick have strong fcc(111) texture while thicker films are dominated by hcp(0001) structure. The intrinsic damping for cobalt thicknesses above 6 nm is weakly dependent on cobalt thickness for both overlayer materials, and below 6 nm the iridium overlayers show higher damping enhancement compared to copper overlayers, as expected due to spin pumping. The interfacial spin mixing conductance is significantly enhanced in structures where both cobalt and iridium have fcc(111) structure in comparison to those where the cobalt layer has subtly different hcp(0001) texture at the interface.

Citation

Tokaç, M., Bunyaev, S., Kakazei, G., Schmool, D., Atkinson, D., & Hindmarch, A. (2015). Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films. Physical Review Letters, 115(5), Article 056601. https://doi.org/10.1103/physrevlett.115.056601

Journal Article Type	Article
Acceptance Date	Jun 29, 2015
Online Publication Date	Jul 30, 2015
Publication Date	Jul 31, 2015
Deposit Date	Jul 30, 2015
Publicly Available Date	Aug 3, 2015
Journal	Physical Review Letters
Print ISSN	0031-9007
Electronic ISSN	1079-7114
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	115
Issue	5
Article Number	056601
DOI	https://doi.org/10.1103/physrevlett.115.056601

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