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Comparative study of [ital J][sub [ital c]]-[ital H] characteristics for silver-sheathed superconducting Bi(2:2:1:2) and Bi(2:2:2:3) tapes

Journal Article · · Applied Physics Letters; (United States)
DOI:https://doi.org/10.1063/1.110997· OSTI ID:5292189
; ; ;  [1]; ; ;  [2];  [3];  [4]
  1. Department of Applied Science, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  2. Superconducting Cryogenic Technology Center, Kobe Steel, Ltd., Kobe 651-22 (Japan)
  3. IGC Advanced Superconductors, Inc., Waterbury, Connecticut 06704 (United States)
  4. Intermagnetic General Corporation, Guilderland, New York 12084 (United States)
+ Show Author Affiliations
Critical current densities [ital J][sub [ital c]] of silver sheathed Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8] and Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10] composite tapes fabricated by a partial melt and a powder-in-tube process, respectively, were measured at 4.2, 27, and 64 K as a function of applied magnetic field and the angle between the tape face and the direction of applied magnetic field. These measurements indicate that (1) the fraction of the grain boundaries, which are strongly coupled, are greater in the Bi(2:2:1:2)/Ag tapes than in the Bi(2:2:2:3)/Ag tapes; (2) the alignment of the Bi cuprate platelets with the [ital c]-axis perpendicular to the tape face is significantly greater for the Bi(2:2:1:2) than for the Bi(2:2:2:3)/Ag tapes; and (3) the [ital E]-[ital J] curves for both kinds of the tapes are described well by an expression, [ital E][similar to]exp[[minus]([ital J][sub 0]/[ital J])[sup [mu]]], where [mu] and [ital J][sub 0] are constants below their transition magnetic fields [ital H][sup *][sub [ital g]].
DOE Contract Number:
AC02-76CH00016
OSTI ID:
5292189
Journal Information:
Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 64:7; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COMPARATIVE EVALUATIONS
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CUPRATES
CURRENTS
ELECTRIC CURRENTS
EVALUATION
FABRICATION
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING WIRES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEXTURE
TRANSITION ELEMENT COMPOUNDS
WIRES