Fraunhofer patterns in magnetic Josephson junctions with non-uniform magnetic susceptibility
Journal Title
Scientific Reports
ISSN
2045-2322
Publisher
Nature Publishing Group
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
B<U+FFFD>rcs<U+FFFD>k, B., Robinson, J., Komori, S., & Alexander, B. (2019). Fraunhofer patterns in magnetic Josephson junctions with non-uniform magnetic susceptibility. Scientific Reports https://doi.org/10.1038/s41598-019-41764-3
Abstract
The development of superconducting memory and logic based on magnetic Josephson junctions relies on an understanding of junction properties and, in particular, the dependence of critical current on external magnetic flux (i.e. Fraunhofer patterns). With the rapid development of Josephson junctions with various forms of inhomogeneous barrier magnetism, Fraunhofer patterns are increasingly complex. In this paper we model Fraunhofer patterns for magnetic Josephson junctions in which the barrier magnetic susceptibility is position- and external magnetic field dependent. The model predicts anomalous Fraunhofer patterns in which local minima in the Josephson critical current can be nonzero and non-periodic with external magnetic flux due to an interference effect between highly magnetised and demagnetised regions.
Sponsorship
Engineering and Physical Sciences Research Council (EP/N017242/1)
Royal Society (UF150676)
Engineering and Physical Sciences Research Council (EP/P026311/1)
Royal Society (RGF\EA\180009)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1038/s41598-019-41764-3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/290792
Rights
Attribution 4.0 International (CC BY)
Licence URL: http://creativecommons.org/licenses/by/4.0/
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