Studies of transport critical currents and intergrain flux pinning in high-T[sub c] ceramic superconductors using persistent-mode rings

Conference · Fri Apr 01 04:00:00 EST 1994 · Journal of Superconductivity; (United States)

OSTI ID:6655220

Jung, J; Isaac, I ^[1]; Mohamed, M A.K. ^[2]

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1. Univ. of Alberta, Edmonton, Alberta (Canada)
2. Univ. of Lethbridge, Alberta (Canada)

The measurements of the intergrain (Josephson) critical current and its dissipation were performed in granular superconductors of YBCO. YBCO/Ag (2 wt.%), and YBCO/Ag (4 wt.%). A self-sustaining supercurrent flowing in a superconducting ring and a contactless detection of its magnitude with a Hall probe were used in these studies. The results suggest that a small variation in the integrain coupling energy is responsible for a weak Josephson flux pinning and a decay of the critical current. 3 refs., 2 figs.

• OSTI ID: 6655220
• Report Number(s): CONF-930710--
• Conference Information: Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL CURRENT
CRYSTAL DOPING
CUPRATES
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FABRICATION
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FLUX
METALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SILVER
SINTERING
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS