1. Nb lateral Josephson junctions induced by a NiFe cross strip.
- Author
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Lin, L. K., Huang, S. Y., Huang, J. H., and Lee, S. F.
- Subjects
JOSEPHSON junctions ,MAGNETIC fields ,FRAUNHOFER region (Electromagnetism) ,STRIP transmission lines ,FERROMAGNETIC materials - Abstract
We fabricated lateral junctions by crossing superconducting Nb strips in metallic contact with a ferromagnetic NiFe strip. Transport measurements on the Nb lateral junctions exhibit modulations of the critical current with a varying perpendicular magnetic field similar to a Fraunhofer interference pattern, which demonstrates the dc Josephson effect. The modulations of the critical current could be attributed to an effective weak link embedded in the Nb strip and formed a Josephson junction. Appearance of Shapiro steps on the current-voltage curves of these junctions when microwaves irradiation is applied proves the ac Josephson effect. The underlying physics of the effective weak link induced by the NiFe strip is discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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