Current-perpendicular-to-plane spin transport properties of CoFe alloys: Spin diffusion length and scattering asymmetry

Title
Current-perpendicular-to-plane spin transport properties of CoFe alloys: Spin diffusion length and scattering asymmetry
Authors
안치의신경호Reza LoloeeJack BassWilliam P. Pratt, Jr
Keywords
CoFe; Spin transport; Spin diffusion length; Scattering asymmetry; CPP; Spin valve; Multilayer
Issue Date
2010-07
Publisher
Journal of applied physics
Citation
VOL 108, NO 2, 023908-1-023908-7
Abstract
From measurements of the current-perpendicular-to-plane magnetoresistance of magnetic multilayers and exchange-biased spin-valves combining the ferromagnetic (F) alloys Co50Fe50 and Co70Fe30 with the nonmagnetic metal Cu, we extract values of the bulk scattering asymmetry, βF, the spin-diffusion length, lsfF , the interface scattering asymmetry, γF/Cu, and twice the enhanced specific resistance, 2ARF/Cu*. The parameters of the two alloys lie within mutual uncertainties of each other. The values of βF~0.88 are unusually large, those of lsfF~ 10 nm are moderate and consistent with values for other F-alloys, and those of 2ARF/Cu* ~ 0.6 fΩ ㎡ and γF/Cu~ 0.6 are both less than those for Co/Cu. We do not need to include any spin-flipping at the F/Cu interfaces to fit our data.
URI
http://pubs.kist.re.kr/handle/201004/37740
ISSN
0021-8979
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KIST Publication > Article
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