Superconducting current leads of YBCO and Pb-BSCCO

The authors fabricated and measured cylindrical superconducting current leads composed of a Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/ (YBCO) and Bi/sub 2-x/Pb/sub x/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/ (Pb-BSCCO) that were approximately 20 cm long and 1 cm/sup 2/ in cross section. A steady-state, DC, criti...

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Veröffentlicht in:	IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1991-03, Vol.27 (2), p.1854-1857
Hauptverfasser:	Gubser, D.U., Miller, M.M., Toth, L., Rayne, R., Lawrence, S., Alford, N.M., Buttons, T.W.
Format:	Artikel
Sprache:	eng
Schlagworte:	360107 > Metals & Alloys-- Superconducting Properties-- (1992-) ALKALINE EARTH METAL COMPOUNDS Applied sciences BARIUM COMPOUNDS BARIUM OXIDES Bismuth BISMUTH COMPOUNDS BISMUTH OXIDES CALCIUM COMPOUNDS CALCIUM OXIDES CHALCOGENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY COPPER COMPOUNDS COPPER OXIDES CRITICAL CURRENT Current measurement CURRENTS DIRECT CURRENT ELECTRIC CONDUCTIVITY ELECTRIC CONDUCTORS ELECTRIC CURRENTS Electrical engineering. Electrical power engineering ELECTRICAL PROPERTIES Exact sciences and technology Lead LEAD COMPOUNDS LEAD OXIDES Magnetic field measurement Magnetic materials MATERIALS SCIENCE OXIDES OXYGEN COMPOUNDS PHYSICAL PROPERTIES Steady-state STEADY-STATE CONDITIONS Strontium STRONTIUM COMPOUNDS STRONTIUM OXIDES SUPERCONDUCTIVITY TEMPERATURE MEASUREMENT TRANSITION ELEMENT COMPOUNDS Various equipment and components Voltage Yttrium barium copper oxide YTTRIUM COMPOUNDS 665412 > Superconducting Devices-- (1992-) YTTRIUM OXIDES
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Beschreibung
Zusammenfassung:	The authors fabricated and measured cylindrical superconducting current leads composed of a Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/ (YBCO) and Bi/sub 2-x/Pb/sub x/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/ (Pb-BSCCO) that were approximately 20 cm long and 1 cm/sup 2/ in cross section. A steady-state, DC, critical current of 170 (230) A at a temperature of 77 K was measured for YBCO (Pb-BSCCO) using a voltage criterion of 210/sup -7/ V ( rho =810/sup -10/ Omega -cm). This current was limited by the current-induced self-magnetic field. At a temperature of 63 K this current increased to approximately 390 (465) A. The character of the magnetic field dependence of the critical current and shape of the current-induced voltage curves are different for the two materials.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.133557