Tl-Ca-Ba-Cu-O step-edge Josephson junctions

Journal Article · Mon Mar 02 04:00:00 EST 1992 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.107458· OSTI ID:7047101

Martens, J S; Zipperian, T E; Vawter, G A; Ginley, D S; Hietala, V M; Tigges, C P ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185-5800 (United States)

There has been considerable progress in the development of nonhysteretic Josephson junction microelectronic technologies for YBaCuO. Such a technology for Tl-Ca-Ba-Cu-O junctions would be interesting because of the higher operating temperatures and the very different grain boundary structures in the different cuprate superconductors. We have successfully made step-edge junctions with TlCaBaCuO grown on ion-milled LaAlO{sub 3}. Nonhysteretic grain boundary-based junctions have been demonstrated with critical current-normal state resistance products exceeding 5 mV at 77 K, critical current densities ranging from 500 to 25 000 A/cm{sup 2}, and critical current versus field profiles suggesting very uniform junctions. Yield has exceeded 70% on over 250 junctions tested and operation has been demonstrated to 100 K.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7047101
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 60:9; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL CURRENT
CRYSTAL STRUCTURE
CUPRATES
CURRENTS
ELECTRIC CURRENTS
FABRICATION
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS