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Scientific article
English

Determination of the intragrain critical current density of the Bi(2223) phase inside Ag-sheathed tapes

Published inSuperconductor Science and Technology, vol. 11, no. 9, p. 837-842
Publication date1998
Abstract

Multifilamentary Ag-sheathed tapes, prepared by the powder-in-tube method, have been characterized by both transport and magnetic techniques at temperatures T between 4.5 K and 85 K in a magnetic field up to 15 T, with the aim of studying the residual presence of a granular behaviour over this wide H-T range. From a comparison between these measurements we have determined a domain of the H-T plane where the current density is still limited by the quality of the boundaries between adjacent grains and the polycrystalline superconductor behaves as a granular one and, on the contrary, the temperature region where it behaves like a strongly connected body. Finally, the temperature behaviour of the intrinsic Bi(2223) current density has been evaluated. At temperatures below 30 K in zero applied field, the intragrain current density is at least an order of magnitude higher than the transport current density.

Citation (ISO format)
CIMBERLE, M.R. et al. Determination of the intragrain critical current density of the Bi(2223) phase inside Ag-sheathed tapes. In: Superconductor Science and Technology, 1998, vol. 11, n° 9, p. 837–842. doi: 10.1088/0953-2048/11/9/003
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ISSN of the journal0953-2048
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