A theory of Andreev reflection in ferromagnet/superconductor/ferromagnet junctions is presented. In the superconductor, the spin polarized quasiparticle current converts to the spinless supercurrent in the range of penetration depth from the interfaces. Therefore, when the thickness of the superconductor is comparable to or smaller than the penetration depth, the current strongly depends on the relative orientation of magnetization of the ferromagnets. We show the effect of spin injection via Andreev reflection on the current flowing through the present system.
- Andreev reflection
- Spin-polarized transport
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics