Multifilamentary, in-situ Route, Cu-stabilized MgB2 Strands

Details Multifilamentary, in-situ Route, Cu-stabilized MgB2 Strands Multifilamentary, in-situ Route, Cu-stabilized MgB2 Strands

2004-09-10

arxiv.org/abs/cond-mat/0409280v1

Physics

Condensed Matter

Superconductivity

10 pages, 3 figs, 2 tables

Scientific paper

10.1088/0953-2048/18/5/026

Transport critical current densities and n-values were measured at 4.2 K in fields up to 15 T on 7, 19, and 37-stack multifilamentary MgB2 strands made using an in-situ route. Some strands included SiC additions (particle size 30 nm), while in others Mg-rich compositions were used. Two basic multifilamentary variants were measured, the first had Nb filamentary barriers, the second had Fe filamentary barriers. All samples incorporated stabilizer in the form of Cu 101. Simple, one-step heat treatments were used, with temperatures ranging from 700-800C, and times from 10-30 minutes. Transport critical current densities of 1.75 x 105 A/cm2 were seen at 4.2 K and 5 T in 37 stack strands.

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