Josephson effect in superconducting constrictions with hybrid SF electrodes: peculiar properties determined by the misorientation of magnetizationsReport as inadecuate



 Josephson effect in superconducting constrictions with hybrid SF electrodes: peculiar properties determined by the misorientation of magnetizations


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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 $\theta $ between the in-plane magnetizations of diffusive ferromagnetic layers F. It is found that the current-phase relation $I\phi$ may be radically modified with the $\theta $ variation: the harmonic $I {1}\sin \phi $ vanishes for definite value of $\theta $ provided for identical orientation of the magnetizations $\theta =0$ the junction is in the $-\pi-$ state. The Josephson current may exhibit a nonmonotonic dependence on the misorientation angle both for realization of $-0 -$ and $-\pi -$ state at $\theta =0$. We also analyze the effect of exchange field induced enhancement of the critical current which may occur in definite range of $\theta $.



Author: A. V. Zaitsev

Source: https://archive.org/







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