Spin injection and magnetoresistance in ferromagnet/superconductor/ferromagnet tunnel junctions
arXiv:cond-mat/9910388 · doi:10.1063/1.373303
Abstract
We theoretically study the spin-dependent transport in a ferromagnet/superconductor/ferro-magnet double barrier tunnel junction. The spin-polarized tunneling currents give rise to spin imbalance in the superconductor. The resulting nonequilibrium spin density suppresses the superconductivity with increase of the tunneling currents. We focus on the effect of asymmetry in the double tunnel junction, where the barrier height of the tunnel junction and the spin-polarization of the ferromagnets are different, on spin injection, and discuss how the superconductivity is suppressed in the asymmetric junction. Our results explain recent experimental results on the critical current suppression in high- SCs by spin injection.
3 pages, 2 figures, proceeding of MMM'99
References in corpus (1)
Cited by in corpus (6)
- Evidence for Suppression of Superconductivity by Spin Imbalance in Co-Al-Co single electron transistors
- Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions
- Spin Injection and Nonlocal Spin Transport in Magnetic Nanostructures
- Diverging Giant Magnetoresistance in the Limit of Infinitely Conducting Spacer
- Joule heating generated by spin current through Josephson junctions
- The Meservey-Tedrov effect in FSF double tunneling junctions