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Magnetic field tunable vortex diode made of YBa2Cu3O7−δ Josephson junction asymmetrical arrays

Chesca, Boris; John, Daniel; Pollett, Richard; Gaifullin, Marat; Cox, Jonathan; Mellor, Christopher; Savelev, Sergey

Authors

Boris Chesca

Daniel John

Richard Pollett

Marat Gaifullin

Jonathan Cox

Sergey Savelev



Abstract

Several Josephson ratchets designed as asymmetrically structured parallel-series arrays of Josephson junctions made of YBa2Cu3O7−δ have been fabricated. From the current-voltage characteristics measured for various values of applied magnetic field, B, in the temperature range of 10–89 K, we demonstrate that the devices work as magnetic field-tunable highly reversible vortex diodes. Thus, at 89 K, the ratchet efficiency η could be reversed from +60% to −60% with a change in B as small as 3 μT. By decreasing the operation temperature, η improves up to −95% at 10 K while the dynamics in the B-tunability degrades. The ratchet designs we propose here can be used to control unidirectional vortex flow vortices in superconducting devices as well as building integrated nano-magnetic sensors. Numerical simulations qualitatively confirm our experimental findings and also provide insight into the related and more general problem of the control of the transport of nano/quantum objects in thin films.

Citation

Chesca, B., John, D., Pollett, R., Gaifullin, M., Cox, J., Mellor, C., & Savelev, S. (in press). Magnetic field tunable vortex diode made of YBa2Cu3O7−δ Josephson junction asymmetrical arrays. Applied Physics Letters, 111(6), https://doi.org/10.1063/1.4997741

Journal Article Type Article
Acceptance Date Jul 26, 2017
Online Publication Date Aug 8, 2017
Deposit Date Sep 7, 2017
Publicly Available Date Sep 7, 2017
Journal Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 0003-6951
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 111
Issue 6
DOI https://doi.org/10.1063/1.4997741
Public URL http://eprints.nottingham.ac.uk/id/eprint/45527
Publisher URL http://aip.scitation.org/doi/10.1063/1.4997741
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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