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

A. V. Zaitsev
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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 $I(ϕ)$ may be radically modified with the $θ$ variation: the harmonic $I_{1}\sin ϕ$ 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 $θ$.

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A. V. Zaitsev. 2006-02-20. Josephson effect in superconducting constrictions with hybrid SF electrodes: peculiar properties determined by the misorientation of magnetizations. https://doi.org/10.1134/s0021364006060038

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