Electromagnetic properties of Bi-2223/Ag concentric tapes

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.511459· OSTI ID:287713

Majoros, M; Polak, M; Kvitkovic, J; Suchon, D ^[1]; Martini, L; Ottoboni, V; Zannella, S ^[2]

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1. Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Electrical Engineering
2. CISE SpA, Segrate (Italy)

It is well established that near the silver interface highly textured Bi-2223 layers compared to the inner ceramic core may be obtained. Thus Bi-2223 multilayered concentric tapes with silver matrix are very promising in increasing transport critical current densities. In the present work the authors report on the electromagnetic characterization of short tapes having in their cross-section a very thin HTS flattened ring with Ag inside and outside of it. The samples were prepared by the powder in tube method and have self-field critical current densities J{sub c} of the order of 3 {times} 10{sup 4} A/cm{sup 2} at 77 K. Transport and SQUID magnetization measurements revealed weak link nature of the samples in low magnetic fields. Large transport J{sub c}(B) hysteresis was observed at 4.2 K and magnetic fields up to 20 T. Magnetic field profiles measurements with miniature Hall sensors are in qualitative accordance with model calculations supposing homogeneous current density distribution across the superconducting core.

• OSTI ID: 287713
• Report Number(s): CONF-950691--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
ELECTRIC CONDUCTORS
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
INTERFACES
MATRIX MATERIALS
MICROSTRUCTURE
SILVER
STRONTIUM OXIDES
SUPERCONDUCTING COMPOSITES