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Title: Critical current density, irreversibility line, and flux creep activation energy in silver-sheathed Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub x] superconducting tapes

Transport data, magnetic hysteresis and flux creep activation energy experimental results are presented for silver-sheathed high-[Tc] Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub x] superconducting tapes. The 110 K superconducting phase was formed by lead doping in a Bi-Sr-Ca-Cu-0 system. The transport critical current density was measured at 4.0 K to be 0.7 [times] 10[sup 5] A/cm[sup 2] (the corresponding critical current is 74 A) at zero field and 1.6 [times] 10[sup 4] A/cm[sup 2] at 12 T for H[parallel]ab. Excellent grain alignment in the a-b plane was achieved by a short-melting method, which considerably improved the critical current density and irreversibility line. Flux creep activation energy as a function of current is obtained based on the magnetic relaxation measurements.
Authors:
; ; ;  [1] ;  [2] ; ; ;  [3]
  1. (Argonne National Lab., IL (United States))
  2. (National Inst. of Standards and Technology (NEL), Boulder, CO (United States). Electromagnetic Technology Div.)
  3. (New South Wales Univ., Kensington, NSW (Australia). School of Materials and Engineering)
Publication Date:
OSTI Identifier:
6923513
Report Number(s):
ANL/CP-77533; CONF-920802--30
ON: DE93002998
DOE Contract Number:
W-31109-ENG-38; FG02-90ER45427
Resource Type:
Conference
Resource Relation:
Conference: Applied superconductivity conference, Chicago, IL (United States), 23-28 Aug 1992
Research Org:
Argonne National Lab., IL (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HIGH-TC SUPERCONDUCTORS; SUPERCONDUCTIVITY; SUPERCONDUCTING FILMS; ACTIVATION ENERGY; BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; CREEP; CRITICAL CURRENT; CURRENT DENSITY; HYSTERESIS; MAGNETIC FLUX; MAGNETIZATION; STRONTIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ENERGY; FILMS; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS 360207* -- Ceramics, Cermets, & Refractories-- Superconducting Properties-- (1992-); 665412 -- Superconducting Devices-- (1992-)