Improvement in critical current density of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub x tapes synthesized by doctor-blade casting and melt growth

Journal Article · Mon Mar 05 00:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102595· OSTI ID:6861608

Kase, J; Irisawa, N; Morimoto, T ^[1]; Togano, K; Kumakura, H; Dietderich, D R; Maeda, H ^[2]

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1. Asahi Glass Research Center, Asahi Glass Co., Ltd., Hazawa-cho, Kanagawa-ku, Yokohama 221, Japan (JP)
2. National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305, Japan (JP)

Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub {ital x}} superconducting tape with an excellent {ital J}{sub {ital c}} at 4.2 K has been synthesized by a modified doctor-blade process. A green tape prepared by doctor-blade casting is laid on a silver foil and heat treated at various temperatures below and above its partial melting temperature. The {ital J}{sub {ital c}} of the tape increases dramatically when heat treated in a narrow temperature range just above the melting temperature. A highly oriented layer structure with {ital c}-axis alignment is obtained by the growth of aligned Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub {ital x}} grains in the partially melted state. This oriented microstructure produces an exceptional increase in {ital J}{sub {ital c}} . Typical {ital J}{sub {ital c}}'s of the tape at 4.2 K are 50 000 A/cm{sup 2} at 0 T, 22 000 A/cm{sup 2} at 10 T, and 17 000 A/cm{sup 2} at 23 T. Note the small magnetic field dependence in {ital J}{sub {ital c}} above 10 T.

• OSTI ID: 6861608
• Journal Information: Applied Physics Letters; (USA), Vol. 56:10; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
SUPERCONDUCTIVITY
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENT DENSITY
EXPERIMENTAL DATA
FABRICATION
HEAT TREATMENTS
LAYERS
MAGNETIC FIELDS
MELTING
PEROVSKITES
SYNTHESIS
TYPE-II SUPERCONDUCTORS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
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360201 - Ceramics
Cermets
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656100 - Condensed Matter Physics- Superconductivity