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Title: Magnetic field tunable vortex diode made of YBaCuO Josephson junction asymmetrical arrays
Authors: Chesca, Boris
John, Daniel
Pollett, Richard
Gaifullin, Marat
Cox, Jonathan
Mellor, Christopher
Savel'ev, Sergey
Editors: Bader, S
Issue Date: 2017
Publisher: AIP Publishing
Citation: CHESCA, B. ... et al, 2017. Magnetic field tunable vortex diode made of YBaCuO Josephson junction asymmetrical arrays. Applied Physics Letters, 111 (6), pp. 062602-062602 (5).
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.
Description: This paper is closed access until 8th August 2018.
Version: Published
DOI: 10.1063/1.4997741
URI: https://dspace.lboro.ac.uk/2134/26149
Publisher Link: http://dx.doi.org/10.1063/1.4997741
ISSN: 0003-6951
Appears in Collections:Closed Access (Physics)

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