Conduction Electron Spin-Flipping at Sputtered Co(90)Fe(10)/Cu Interfaces
H.Y.T.Nguyen, R. Acharyya, W.P. Pratt Jr., and J. Bass
TL;DR
This study measures the spin-flipping probability at Co(90)Fe(10)/Cu interfaces using CPP magnetoresistance in multilayers, revealing a specific parameter value that quantifies interface spin-flip scattering.
Contribution
It provides the first quantitative measurement of the spin-flipping parameter at sputtered CoFe/Cu interfaces using CPP magnetoresistance data.
Findings
Delta parameter = 0.19 +/- 0.04
Spin-flip probability P derived from delta
Quantitative characterization of interface spin-flip
Abstract
From measurements of the current-perpendicular-to-plane (CPP) magnetoresistance of ferromagnetically coupled [Co(90)Fe(10)/Cu]xn multilayers, within sputtered Permalloy-based double exchange biased spin-valves, we determine the parameter delta[(Co(90)Fe(10))/Cu] = 0.19 +/- 0.04 that sets the probability P of spin-flipping at a Co(90)Fe(10)/Cu interface via the equation P = 1 - exp(-delta).
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