Limiting factors for critical current densities in Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10]-Ag composite superconducting tapes at elevated temperatures

Journal Article · Mon Dec 20 04:00:00 EST 1993 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.110112· OSTI ID:5661122

Shibutani, K; Li, Q; Sabatini, R L; Suenaga, M ^[1]; Motowidlo, L ^[2]; Haldar, P ^[3]

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1. Department of Applied Science, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. IGC Advanced Superconductors, Inc., Waterbury, Connecticut 06704 (United States)
3. Intermagnetic General Corp., Guilderland, New York 12084 (United States)

Detailed measurements of [ital I]-[ital V] curves at 4.2, 65, and 77 K as a function of applied magnetic field for two Bi(2:2:2:3)/Ag tapes, having critical current densities [ital J][sub [ital c]] of [similar to]1 and [similar to]2[times]10[sup 4] A/cm[sup 2] (at 77 K and 0 T), revealed that (1) the primary limiting factor for the transport critical current densities in these tapes is the presence of a large fraction of weak and/or nonsuperconducting grain boundaries; (2) the observed dissipative voltages are due, however, mostly to the motion of the magnetic vortices in the grains; and (3) the [ital E]-[ital J] curves are well described by an expression, [ital E][similar to]exp[[minus]([ital J][sub 0]/[ital J])[sup [mu]]], rather than the commonly used power law, i.e., [ital E][similar to][ital J][sup [ital n]], where [mu], [ital J][sub 0], and [ital n] are constants.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5661122
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:25; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CABLES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
CONDUCTOR DEVICES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CABLES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
EQUIPMENT
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MATERIALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SILVER ADDITIONS
SILVER ALLOYS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING CABLES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VORTICES