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.
@article{arxiv.0809.1576,
title = {Size Dependence of Current Spin Polarization Through Superconductor/Ferromagnet Nanocontacts},
author = {M. Stokmaier and G. Goll and D. Weissenberger and C. Sürgers and H. v. Löhneysen},
journal= {arXiv preprint arXiv:0809.1576},
year = {2009}
}
Comments
4 pages, 4 figures, accepted for publication in Phys. Rev. Lett