Development of Doped MgB2 Wires and Tapes for Practical Applications
arXiv:1001.1219 · doi:10.1109/TASC.2010.2040605
Abstract
A review of current developments in the study of chemical doping effect on the superconducting properties of MgB2 wires and tapes is presented, based on the known literature data and our own results. The critical current density of MgB2 can be improved through various kinds of dopants. Among these dopants, doping with carbon-containing materials seems to be the most effective way to improve the Jc performance. The doping effect of carbon in different forms and carbon-based compounds such as SiC, nano-C, metal carbides, as well as aromatic hydrocarbon and carbohydrate on the Jc-B characteristics of MgB2 was discussed in detail. The C can be incorporated into the MgB2 crystal lattice by replacing boron, and thus Bc2 is significantly enhanced due to selective tuning of impurity scattering of two bands in the two-band MgB2. Besides the efforts of increasing Bc2 by carbon doping, the fine grain size and nano-size inclusions caused by doping would create many flux pinning centres improving the Jc-B property of MgB2. Based on these considerations, we suggested some principles for the selection of dopants.
6 pages, 11 figures. IEEE Trans. Appl. Supercond., accepted
References in corpus (18)
- Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping
- Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
- Systematic effects of carbon doping on the superconducting properties of Mg(BC)
- High-field superconductivity in alloyed MgB2 thin films
- Significantly enhanced critical current densities in MgB2 tapes made by a scaleable, nano-carbon addition route
- Improved Hc2 in Bulk-Form Magnesium Diboride by Mechanical Alloying With Carbon
- Prospects for Improving the Intrinsic and Extrinsic Properties of Magnesium Diboride Superconducting Strands
- Effect of aromatic hydrocarbon addition on in situ powder-in-tube processed MgB2 tapes
- Large Upper Critical Field and Irreversibility Field in MgB2 wires with SiC additions
- Improved critical current densities in B4C doped MgB2 based wires
- Improved Irreversibility Behaviour and Critical Current Density in MgB2-Diamond Nanocomposites
- Enhancement of in-field Jc in MgB2/Fe wire using single and multi-walled nanotubes
- Enhanced Critical parameters of nano-Carbon doped MgB2 Superconductor
- Enhanced critical current density of MgB2 superconductor synthesized in high magnetic fields
- Magnetic field processing to enhance critical current densities of MgB2 superconductors
- Large irreversibility field in nanoscale C-doped MgB2/Fe tape conductors
- Strongly Enhanced Current-Carrying Performance in MgB2 Tape Conductors by Novel C60 Doping
- Hollow carbon spheres as an efficient dopant for enhancing critical current density of MgB2 based tapes