This article is cited in 27 papers

CONDENSED MATTER

Effective decrease in the exchange energy in $S$--$(FN)$--$S$ Josephson structures

T. Yu. Karminskaya, M. Yu. Kupriyanov

Institute of Nuclear Physics, Moscow State University

Abstract: The critical current I _c of S-(FN)-S Josephson structures has been calculated as a function of the distance L between superconducting (S) electrodes using the Usadel quasiclassical equations for the case of specifying the supercurrent in the direction parallel to the interface between the ferromagnetic (F) and normal (N) films of the composite weak-link region. It has been shown that, owing to the interaction between F and N films, both the typical decrease scale I _c(L) and the period of the critical current oscillations can be much larger than the respective quantities for the SFS junctions. The conditions have been determined under which these lengths are on the order of the effective depth ζ_N of superconductivity penetration to a normal metal.

PACS: 74.50.+r, 74.80.Fp

Received: 08.02.2007
Revised: 19.02.2007

 English version: Journal of Experimental and Theoretical Physics Letters, 2007, 85:6, 286–291

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