Anisotropic Josephson junctions of Y-Ba-Cu-O/Au/Nb film sandwiches
- Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, Japan (JP)
Superconductor-normal metal-superconductor (SNS) Josephson junctions consisting of Y-Ba-Cu-O/Au/Nb film-layered structure have been fabricated using epitaxial Y-Ba-Cu-O films. SNS junctions with {ital a}-{ital b} plane orientated Y-Ba-Cu-O films exhibit the Josephson effect, while the junctions with {ital c}-axis orientated Y-Ba-Cu-O films have no Josephson current. Moreover, {ital a}-{ital b} plane orientated junctions show anisotropic Fraunhofer patterns in the magnetic field dependence of the critical current according to the direction of film orientations. These anisotropic behaviors reveal that the proximity effect is strongly affected by the anisotropic coherence length and the magnetic penetration depth of Y-Ba-Cu-O films.
- OSTI ID:
- 6900754
- Journal Information:
- Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:15; ISSN APPLA; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
EPITAXY
FABRICATION
FILMS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PROXIMITY EFFECT
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES