Critical current density, irreversibility line, and flux creep activation energy in silver-sheathed Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ superconducting tapes

Experimental transport data, magnetic hysteresis, and flux creep activation energy results are presented for silver-sheathed high-T/sub c/ Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ superconducting tapes. The 110 K superconducting phase was formed by lead doping in a Bi-Sr-Ca-Cu-O system. The tran...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 1993-03, Vol.3 (1), p.1194-1196
Hauptverfasser:	Shi, D., Wang, Z., Sengupta, S., Smith, M., Goodrich, L.F., Dou, S.X., Liu, H.K., Guo, Y.C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bismuth Creep Critical current density Current measurement Density measurement Doping Magnetic field measurement Magnetic hysteresis Strontium Superconducting films
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Zusammenfassung:	Experimental transport data, magnetic hysteresis, and flux creep activation energy results are presented for silver-sheathed high-T/sub c/ Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ superconducting tapes. The 110 K superconducting phase was formed by lead doping in a Bi-Sr-Ca-Cu-O system. The transport critical current density was measured at 4.0 K to be 0.710/sup 5/ A/cm/sup 2/ (the corresponding critical current is 74 A) at zero field and 1.610/sup 4/ A/cm/sup 2/ at 12 T for H// ab. Excellent grain alignment in the a-b plane was achieved by a short-melting method, which considerably improved the critical current density and irreversibility line. Flux creep activation energy as a function of current is obtained based on the magnetic relaxation measurements.< >
ISSN:	1051-8223 1558-2515
DOI:	10.1109/77.233338