Spin pumping in Co56Fe24B20 multilayer

H. Lee, L. Wen, M. Pathak, P. Janssen, P.R. LeClair, C. Alexander, C.K.A. Mewes, T. Mewes

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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Samenvatting

Broadband in-plane ferromagnetic resonance measurements were performed over a frequency range from 7 to 40 GHz on various Co56Fe24B20 systems with adjacent thin non-magnetic layers of Ru, Ta and Cu. Co56Fe24B20 samples bounded by either Ru or Ta layers exhibit a contribution to the Gilbert damping constant inversely proportional to the thickness of the Co56Fe24B20 layer, consistent with spin-pumping theory. In contrast, samples with 20 nm thick Cu bounding layers did not show a significant dependence of the Gilbert damping constant on the Co56Fe24B20 thickness, which can be understood based on the far larger spin diffusion length of Cu in comparison with Ru or Ta.
Originele taal-2Engels
Pagina's (van-tot)215001-1/5
Aantal pagina's5
TijdschriftJournal of Physics D: Applied Physics
Volume41
DOI's
StatusGepubliceerd - 2008

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