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Determining the current polarization on Al/Co nanostructured point contacts

Löhneysen, H. von; Pérez-Willard, F.; Cuevas, J. C.; Sürgers, C.; Pfundstein, P.; Kopu, J.; Eschrig, M.

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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DOI: 10.1103/PhysRevB.69.140502
Zitationen: 56
Web of Science
Zitationen: 52
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Institut für Festkörperphysik (IFP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2004
Sprache Englisch
Identifikator ISSN: 0163-1829, 0556-2805, 1094-1622, 1095-3795, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen-ID: 1000013577
HGF-Programm 52.01.01 (POF I, LK 01)
Erschienen in Physical review / B
Band 69
Heft 14
Seiten Art.Nr. 140502
Nachgewiesen in Scopus
Web of Science
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