Fabrication and transport critical currents of multifilamentary MgB2/Fe wires and tapes

Details Fabrication and transport critical currents of multifilamentary MgB2/Fe wires and tapes Fabrication and transport critical currents of multifilamentary MgB2/Fe wires and tapes

2002-03-06

arxiv.org/abs/cond-mat/0203114v1

Physics

Condensed Matter

Superconductivity

13 pages, 7 figures

Scientific paper

10.1088/0953-2048/15/7/312

Multifilamentary MgB2/Fe wires and tapes with high transport critical current densities have been fabricated using a straightforward powder-in-tube (PIT) process. After annealing, we measured transport jc values up to 1.1 * 105 A/cm2 at 4.2 K and in a field of 2 T in a MgB2/Fe square wire with 7 filaments fabricated by two-axial rolling, and up to 5 * 104 A/cm2 at 4.2 K in 1 T in a MgB2/Fe tape with 7 filaments. For higher currents these multifilamentary wires and tapes quenched due to insufficient thermal stability of filaments. Both the processing routes and deformation methods were found to be important factors for fabricating multifilamentary MgB2 wires and tapes with high transport jc values.

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