Superconducting tapes with critical current density of 10 sup 4 A/cm sup 2 at 77 K and zero magnetic field

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5877928

Narumi, E; Song, L W; Hwa, S; Ye, J; Yang, F; Kao, Y H; Patel, S; Shaw, D T ^[1]; Tkaczyk, J E ^[2]

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1. New York State Inst. on Superconductivity, State Univ. of New York at Buffalo, Buffalo, NY (US)
2. General Electric Co., Schenectady, NY (United States). Corporate Research and Development Center

This paper reports on critical current density above 10{sup 4} A/cm{sup 2} at both YBa{sub 2}Cu{sub 3}O{sub 6.8} (YBCO) thin films on metallic substrates and Bi-based superconducting films on silver tapes. A transition buffer, consisting of sub-buffers deposited at different temperatures, was used to enhance the crystallinity and the transport properties of YBCO films on metallic substrates. YBCO films were fabricated, using in-situ laser deposition, and they were strongly c-axis oriented. Critical temperature of 87 K and critical current density of 3 {times} 10{sup 4} A/cm{sup 2} at 77 K were obtained for a 0.5 {mu}m-thick YBCO film. Also, the magnetic field dependence of J{sub c} could be increased by using Pt-coated metallic substrates. For 10 {approximately} 20 {mu}m-thick Bi-based superconducting tape, by using brush-on technique and heat treatment, critical current of 10{sup 4} A/cm{sup 2} at 77 K was obtained.

• OSTI ID: 5877928
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SUPERCONDUCTING FILMS
CRITICAL CURRENT
FABRICATION
PHYSICAL PROPERTIES
ANNEALING
BARIUM OXIDES
BISMUTH
COATINGS
COPPER OXIDES
CURRENT DENSITY
HEAT TREATMENTS
LASER BEAM MACHINING
MAGNETIC FLUX
SILVER
SUBSTRATES
THIN FILMS
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FILMS
MACHINING
METALS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)