Improving the I{sub c}R{sub n} product and the reproducibility of high T{sub c} Josephson junctions made by ion irradiation

Journal Article · Mon Dec 24 00:00:00 EST 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2828133· OSTI ID:21016320

Sirena, M; Fabreges, X; Bergeal, N; Lesueur, J; Faini, G; Bernard, R; Briatico, J ^[1]

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1. UPR5-LPEM-CNRS, Physique Quantique, E.S.P.C.I., 10 Rue Vauquelin, 75231 Paris (France)

A simple model has been proposed to explain the spread in the characteristics of high T{sub c} Josephson junctions made by ion irradiation, assuming that the source of dispersion is the slit's size variation. Accordingly, increasing ion energy should lead to a significant reduction of inhomogeneities. Test samples have been fabricated using two different beam energies. As predicted, the spread in critical current decreases upon increasing energy. Moreover, since the actual width of the barrier is reduced in this case, the I{sub c}R{sub n} product increases significantly. These results seem promising for future technological applications.

• OSTI ID: 21016320
• Journal Information: Applied Physics Letters, Vol. 91, Issue 26; Other Information: DOI: 10.1063/1.2828133; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CRITICAL CURRENT
HIGH-TC SUPERCONDUCTORS
ION BEAMS
IRRADIATION
JOSEPHSON JUNCTIONS
YTTRIUM COMPOUNDS