A1 Journal article (refereed)
Magnetic field-controlled 0−π transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions (2020)
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
JYU authors or editors
Publication details
All authors or editors: Vargunin, A.; Silaev, M. A.
Journal or series: Applied Physics Letters
ISSN: 0003-6951
eISSN: 1077-3118
Publication year: 2020
Volume: 116
Issue number: 9
Article number: 092601
Publisher: American Institute of Physics
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1063/1.5143269
Publication open access: Not open
Publication channel open access:
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68041
Web address of parallel published publication (pre-print): https://arxiv.org/abs/1912.10144
Abstract
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.
Keywords: superconductors; magnetic fields
Free keywords: superconductors; ferromagnetic materials; superconducting devices; magnetic fields; exchange interactions
Contributing organizations
Related projects
- Spin-kinetiikka suprajohteissa ja topologisissa supranesteissä
- Silaev, Mikhail
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2020
JUFO rating: 2