Superconducting decay length in a ferromagnetic metal

Details Superconducting decay length in a ferromagnetic metal Superconducting decay length in a ferromagnetic metal

2006-05-05

arxiv.org/abs/cond-mat/0605137v1

Pis'ma v ZhETF 83, 487 (2006)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

The complex decay length xi characterizing penetration of superconducting correlations into a ferromagnet due to the proximity effect is studied theoretically in the frame of the linearized Eilenberger equations. The real part xi_1 and imaginary part xi_2 of the decay length are calculated as functions of exchange energy and the rates of ordinary, spin flip and spin orbit electronic scattering in a ferromagnet. The lengths xi_1,2 determine the spatial scales of, respectively, decay and oscillation of a critical current in SFS Josephson junctions in the limit of large distance between superconducting electrodes. The developed theory provides the criteria of applicability of the expressions for xi_1 and xi_2 in the dirty and the clean limits which are commonly used in the analysis of SF hybrid structures.

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