Irreversibility Field and Flux Pinning in MgB2 with and Without SiC Additions

Details Irreversibility Field and Flux Pinning in MgB2 with and Without SiC Additions Irreversibility Field and Flux Pinning in MgB2 with and Without SiC Additions

2004-10-12

arxiv.org/abs/cond-mat/0410301v1

Superconductor Science and Technology 2004

Physics

Condensed Matter

Superconductivity

15 pages, 1 table, six figs

Scientific paper

10.1088/0953-2048/17/10/017

Critical current density was measured at 4.2 K for MgB2 strands with and without SiC additions. In some cases measurements were performed on longer (1 m) samples wound on barrels, and these were compared to magnetic measurements. Most measurements were performed on short samples at higher fields (up to 18 T). It was found that in-situ processed strands with 10% SiC additions HT at 700-800C show improved Hr and Fp values as compared to control samples, with Hr increasing by 1.5 T. At 900C even larger improvements are seen, with Hr reaching 18 T and Fp values maximizing at 20 GN/m3.

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