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VOLUME 83 (2006) | ISSUE 6 | PAGE 277
Josephson effect in superconducting constrictions with hybrid SF electrodes: peculiar properties determined by the misorientation of magnetizations
PACS: 73.21.-b, 74.45.+c, 74.50.+r
Abstract
Josephson current in SFcFS junctions with arbitrary transparency of the constriction (c) is investigated. The emphasis is done on the analysis of the supercurrent dependencies on the misorientation angle θ  between the in-plane magnetizations of diffusive ferromagnetic layers (F). It is found that the current-phase relation I(\varphi) may be radically modified with the θ  variation: the harmonic I_{1}\sin \varphi vanishes for definite value of θ  provided for identical orientation of the magnetizations (θ =0) the junction is in the "π" state. The Josephson current may exhibit a nonmonotonic dependence on the misorientation angle both for realization of "0 " and "π " state at θ =0. We also analyze the effect of exchange field induced enhancement of the critical current which may occur in definite range of θ .