Huge nonequilibrium magnetoresistance in hybrid superconducting spin valves

Details Huge nonequilibrium magnetoresistance in hybrid superconducting spin valves Huge nonequilibrium magnetoresistance in hybrid superconducting spin valves

2006-03-21

arxiv.org/abs/cond-mat/0603555v1

Appl. Phys. Lett. 89, 022505 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1063/1.2220001

A hybrid ferromagnet-superconductor spin valve is proposed. Its operation relies on the interplay between nonequilibrium transport and proximity-induced exchange coupling in superconductors. Huge tunnel magnetoresistance values as large as some 10^6% can be achieved in suitable ferromagnet-superconductor combinations under proper voltage biasing. The controllable spin-filter nature of the structure combined with its intrinsic simplicity make this setup attractive for low-temperature spintronic applications where reduced power dissipation is an additional requirement.

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