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 m2 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.
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