Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes
arXiv:cond-mat/0106341 · doi:10.1063/1.1415349
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.
11 pages, 3 figures
References in corpus (8)
- Strongly linked current flow in polycrystalline forms of the new superconductor MgB2
- Superconductivity in Dense Wires
- Thin Film Magnesium Boride Superconductor with Very High Critical Current Density and Enhanced Irreversibility Field
- Large transport critical currents in unsintered MgB2 superconducting tapes
- Superconducting Properties of MgB2 Bulk Materials Prepared by High Pressure Sintering
- High transport critical current density obtained for Powder-In-Tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes
- High transport critical current density above 30 K in pure Fe-clad MgB2 tape
- Superconducting MgB(2) films via precursor post-processing approach
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