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

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Related projects

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2