Size Dependence of Current Spin Polarization Through Superconductor/Ferromagnet Nanocontacts

Details Size Dependence of Current Spin Polarization Through Superconductor/Ferromagnet Nanocontacts Size Dependence of Current Spin Polarization Through Superconductor/Ferromagnet Nanocontacts

2008-09-09

arxiv.org/abs/0809.1576v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.101.147005

The spin polarization P of the transport current through the interface between superconducting Al and ferromagnetic Fe is determined by means of Andreev reflection at nanostructured point contacts. We observe a systematic decrease of P with decreasing contact resistance. Our data provide evidence for the reduction of P by spin-orbit scattering and thus establish a link between density-of-states and transport spin polarizations.

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