Investigation of ErBa sub 2 Cu sub 3 O sub 7 /Cu sub 2 O/normal metal tunnel structures

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5876465

Thorpe, T P; Cukauskas, E J; Allen, L H; Reeves, M ^[1]

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1. Naval Research Lab., Washington, DC (United States)

Tunneling studies have been made using sputtered Cu{sub 2}O as an insulating barrier between a EBCO thin film and a normal metallic layer. Cu{sub 2}O was selected both for its low potential for chemical reaction with the superconducting layer, and for its photoconductive properties. Having a band gap in the visible (2 eV), Cu{sub 2}O is a suitable candidate for photosensitive tunneling experiments. EBCO thin films were deposited in-situ onto MgO substrates using an off-axis sputtering technique. T{sub c}'s of as-deposited films were between 80 and 85 K. Inductively measured Jc's ranged between 10{sup 6} and 10{sup 7} A/cm{sup 2} at 4K. A 5-20 nm layer of Cu{sub 2}O was sputtered directly on top of the superconducting film. Room temperature resistivities of the Cu{sub 2}O layer were typically greater than 10{sup 6} ohm-cm. A normal metal layer (typically gold) was then deposited onto the Cu{sub 2}O layer. Transport properties of the structure were then measured at temperatures ranging above and below the T{sub c} of the superconducting layer. In this paper a summary of results will be presented.

• OSTI ID: 5876465
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
TUNNEL EFFECT
COPPER OXIDES
ERBIUM OXIDES
METALS
CRITICAL CURRENT
DEPOSITION
EXPERIMENTAL DATA
LAYERS
MAGNESIUM OXIDES
PHOTOSENSITIVITY
SPUTTERING
SUBSTRATES
SUPERCONDUCTING FILMS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
DATA
ELECTRIC CURRENTS
ELEMENTS
ERBIUM COMPOUNDS
FILMS
INFORMATION
MAGNESIUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SENSITIVITY
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)