Determining the current polarization in Al/Co nanostructured point contacts

Details Determining the current polarization in Al/Co nanostructured point contacts Determining the current polarization in Al/Co nanostructured point contacts

2003-06-10

arxiv.org/abs/cond-mat/0306241v1

Physics

Condensed Matter

Superconductivity

4 pages, RevTeX4, 3 figures, 1 table

Scientific paper

10.1103/PhysRevB.69.140502

We present a study of the Andreev reflections in superconductor/ferromagnet nanostructured point contacts. The experimental data are analyzed in the frame of a model with two spin-dependent transmission coefficients for the majority and minority charge carriers in the ferromagnet. This model consistently describes the whole set of conductance measurements as a function of voltage, temperature, and magnetic field. The ensemble of our results shows that the degree of spin polarization of the current can be unambiguously determined using Andreev physics.

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