Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes

HongLi Suo; Concetta Beneduce; Marc Dhalle; Nicolas Musolino; Jean-Yves Genoud; Rene Flukiger

doi:10.1063/1.1415349

Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes

Superconductivity 2009-11-07 v1

Authors: HongLi Suo , Concetta Beneduce , Marc Dhalle , Nicolas Musolino , Jean-Yves Genoud , Rene Flukiger

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Abstract

We report on the preparation of dense monofilamentary MgB2/Ni and MgB2/Fe tapes with high critical current densities. In annealed MgB2/Ni tapes, we obtained transport critical current densities as high as 2.3*105 A/cm2 at 4.2 K and 1.5 T, and for MgB2/Fe tapes 104 A/cm2 at 4.2 K and 6.5 T. To the best of our knowledge, these are the highest transport jc values at 4.2 K reported for MgB2 based tapes so far. An extrapolation to zero field of the MgB2/Fe data gives a critical current value of ~ 1 MA/cm2, corresponding to an critical current value well above 1000 A. The high jc values obtained after annealing are a consequence of sintering densification and grain reconnection. Fe does not react with MgB2 and is thus an excellent sheath material candidate for tapes with self-field jc values at 4.2 K in excess of 1 MA/cm2.

Keywords

MgB2 tapes critical current density superconducting tapes Fe/Ni cladding annealing

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@article{arxiv.cond-mat/0106341,
  title  = {Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes},
  author = {HongLi Suo and Concetta Beneduce and Marc Dhalle and Nicolas Musolino and Jean-Yves Genoud and Rene Flukiger},
  journal= {arXiv preprint arXiv:cond-mat/0106341},
  year   = {2009}
}

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11 pages, 3 figures

Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes

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