Magnetic field-controlled 0−π transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions
Vargunin, A., & Silaev, M. A. (2020). Magnetic field-controlled 0−π transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions. Applied Physics Letters, 116(9), Article 092601. https://doi.org/10.1063/1.5143269
Published inApplied Physics Letters
© 2020 Author(s)
Superconductor-ferromagnet-superconductor Josephson junctions are known to exist in the 0 and π states with the transitions between them controlled by the temperature and ferromagnetic interlayer thickness. We demonstrate that these transitions can be controlled also by the external magnetic field directed perpendicular to the layers. By varying the ratio of diffusion coefficients in superconducting and ferromagnetic layers, these field-controlled transitions can be made detectable for arbitrary large values of the exchange energy in the ferromagnet. We also show that the 0−π transitions in the perpendicular field can be observed as the specific features of the flux-flow conductivity dependencies on the ferromagnetic thickness in accordance with recent experimental results.
PublisherAmerican Institute of Physics
Publication in research information system
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Related funder(s)Academy of Finland
Funding program(s)Research post as Academy Research Fellow, AoF
Additional information about fundingThis work was supported by the Academy of Finland (Project No. 297439), the Russian Science Foundation (Grant No. 19-19-00594), and the European Regional Development Fund (Mobilitas Pluss under Grant No. MOBTP152).
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