Spin filtering of free electrons by magnetic multilayers: towards an efficient self-calibrated spin polarimeter

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...

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Bibliographic Details
Published in:Physical review letters 2002-02, Vol.88 (6), p.066601-066601, Article 066601
Main Authors: Cacho, C, Lassailly, Y, Drouhin, H J, Lampel, G, Peretti, J
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.88.066601