Transverse distribution of the transport current density in (Bi, Pb)2223 tapes

Yi, Z., Beduz, C., Al-Mosawi, M. and Riddle, R. (1997) Transverse distribution of the transport current density in (Bi, Pb)2223 tapes. Physica C: Superconductivity and its Applications, 277 (3-4), 233-237. (doi:10.1016/S0921-4534(97)00080-4).

Record type: Article

Abstract

The distribution of the critical transport current density, Jc, has been measured across the core thickness of silver sheathed (Bi, Pb)2223 tapes which contained silver addition of different particle sizes. We have found the Jc of tapes without silver addition and with 8 wt% silver addition of small particle size decreases continuously with distance from the core-sheath interface. The Jc of layers close to the silver sheath is up to four times higher than that of central layers, e.g. 3 × 104A cm?2 near the sheath and 7 × 103 Acm?2 in the centre at 77 K and self field. The tape with addition of 50 wt% 80 ?m silver particles shows a uniform Jc of about 2 × 104 A cm?2 throughout the core thickness. The V?I characteristics of the baser core of the tape without silver addition have also been measured in magnetic fields.

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