Spin filtering of free electrons by magnetic multilayers: towards an efficient self-calibrated spin polarimeter |
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Authors: | Cacho C Lassailly Y Drouhin H J Lampel G Peretti J |
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Affiliation: | Laboratoire de Physique de la Matière Condensée (UMR 7643-CNRS), Ecole Polytechnique, F-91128 Palaiseau, France. c.cacho@dl.ac.uk |
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Abstract: | An asymmetrical ferromagnetic cobalt bilayer (18 nm Au/0.8 nm Co/2.2 nm Au/1.3 nm Co/1.5 nm Au) operates as a self-calibrated spin polarimeter with a high spin selectivity for free electrons injected at a few eV above the Fermi level. We present the analysis of transmitted currents as a function of the incident energy, based on a model of spin polarization dilution into the first gold layer and ballistic transport close to the vacuum level throughout the sample. |
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