Inhomogeneous magnetism induced in a superconductor at superconductor-ferromagnet interface

Details Inhomogeneous magnetism induced in a superconductor at superconductor-ferromagnet interface Inhomogeneous magnetism induced in a superconductor at superconductor-ferromagnet interface

2002-01-29

arxiv.org/abs/cond-mat/0201534v2

Physics

Condensed Matter

Superconductivity

10 pages, 7 Postscript figures

Scientific paper

10.1103/PhysRevB.66.014521

We study a magnetic proximity effect at superconductor (S) - ferromagnet (F) interface. It is shown that due to an exchange of electrons between the F and S metals ferromagnetic correlations extend into the superconductor, being dependent on interface parameters. We show that ferromagnetic exchange field pair breaking effect leads to a formation of subgap bands in the S layer local density of states, that accommodate only one spin-polarized quasiparticles. Equilibrium magnetization leakage into the S layer as function of SF interface quality and a value of ferromagnetic interaction have also been calculated. We show that a damped-oscillatory behavior versus distance from SF interface is a distinguished feature of the exchange-induced magnetization of the S layer.

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