Irreversibility behavior in Ag-sheathed Bi-based superconducting wires

Conference · Wed Apr 01 00:00:00 EST 1992

OSTI ID:5100911

Dou, S X; Liu, H K; Guo, Y C; Wang, J; Jin, X J; Hu, Q Y ^[1]; Shi, D L; Salem-Sugui, S; Wang, Z ^[2]

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1. New South Wales Univ., Kensington (Australia)
2. Argonne National Lab., IL (United States)

Irreversibility lines for Ag/(Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y}(2223) wires prepared through a phase formation- decomposition-recovery (PFDR) process and normal annealing process were determined using both AC susceptibility measurements under DC fields and magnetisation measurements. It was found that flux pinning was enhanced in the PFDR processed samples over the normal processed samples, in particular at temperature above 77 K. The PFDR process results in high mass density, grain alignment, uniform distribution of impurity precipitates and high density of defects. The irreversibility temperatures scaled with the applied field according to H{sup 1/3}, which is in contrast to H{sup 2/3} law for YBa{sub 2}Cu{sub 3}O{sub 7-x} and conventional superconductors. The irreversibility lines for PFDR processed tapes showed a crossover with those for normal processed tapes at temperature below {Tc} of the (Bi,Pb){sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} (2212), suggesting that at temperature above {Tc} of the 2212 phase, the 2212 as nonsuperconducting region, may serve as effective pinning sites for fluxoids.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5100911
• Report Number(s): ANL/CP-76361; CONF-920402-38; ON: DE92016698
• Resource Relation: Conference: Material Research Society spring meeting, San Francisco, CA (United States), 27 Apr - 2 May 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
MAGNETIC PROPERTIES
CALCIUM OXIDES
COPPER OXIDES
LEAD OXIDES
STRONTIUM OXIDES
SUPERCONDUCTING WIRES
CRITICAL CURRENT
ANNEALING
CURRENT DENSITY
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
SILVER
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
HEAT TREATMENTS
LEAD COMPOUNDS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WIRES
360207* - Ceramics
Cermets
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360204 - Ceramics
Cermets
& Refractories- Physical Properties
665412 - Superconducting Devices- (1992-)