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Interplay between spin-relaxation and Andreev reflection in ferromagnetic wires with superconducting contacts

Interplay between spin-relaxation and Andreev reflection in ferromagnetic wires with... We analyze the change in the resistance of a junction between a diffusive ferromagnetic (F) wire and normal-metal electrode, due to the onset of superconductivity (S) in the latter and a double Andreev scattering process leading to a complete internal reflection of a large fraction of the spin-polarized electrons back into the ferromagnet. The superconducting transition results in an additional contact resistance arising from the necessity to match the spin-polarized current in F wire to the spinless current in S reservoir, which is comparable to the resistance of a piece of a F wire with the length equal to the spin-relaxation length. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Interplay between spin-relaxation and Andreev reflection in ferromagnetic wires with superconducting contacts

Physical Review B , Volume 60 (22) – Dec 1, 1999
4 pages

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References (1)

Publisher
American Physical Society (APS)
Copyright
Copyright © 1999 The American Physical Society
ISSN
1095-3795
DOI
10.1103/PhysRevB.60.15394
Publisher site
See Article on Publisher Site

Abstract

We analyze the change in the resistance of a junction between a diffusive ferromagnetic (F) wire and normal-metal electrode, due to the onset of superconductivity (S) in the latter and a double Andreev scattering process leading to a complete internal reflection of a large fraction of the spin-polarized electrons back into the ferromagnet. The superconducting transition results in an additional contact resistance arising from the necessity to match the spin-polarized current in F wire to the spinless current in S reservoir, which is comparable to the resistance of a piece of a F wire with the length equal to the spin-relaxation length.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Dec 1, 1999

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