Enhanced superconducting properties of pre-doped B powder type MgB2 strands

M. A. Susner; Y. Yang; M. D. Sumption; M. A. Rindfleisch; M. J. Tomsic; J. V. Marzik; E. W. Collings

Enhanced superconducting properties of pre-doped B powder type MgB2 strands

Superconductivity 2010-08-20 v1

Authors: M. A. Susner , Y. Yang , M. D. Sumption , M. A. Rindfleisch , M. J. Tomsic , J. V. Marzik , E. W. Collings

Abstract

Conventional doping methods that directly add C or a C-bearing species to Mg+B powder have the disadvantage of adding C inhomogeneously, yielding either under-reacted regions or blocking phases. Pre-doped B powder provides a more homogeneous distribution of the C dopant in MgB2. Powders containing varying amounts of C were used to produce in-situ MgB2 strands which showed high values of transport Jc (104 A/cm2 at 13.3T). Compared to SiC-added and malic acid-treated strands the pre-doped MgB2 showed both higher values of Birr and transport Jc, indicating that the pre-doping of B leads to more efficient C substitution into the B-sublattice.

Keywords

MgB2 strands pre-doped boron carbon doping critical current density irreversibility field superconducting properties

Cite

@article{arxiv.1008.3174,
  title  = {Enhanced superconducting properties of pre-doped B powder type MgB2 strands},
  author = {M. A. Susner and Y. Yang and M. D. Sumption and M. A. Rindfleisch and M. J. Tomsic and J. V. Marzik and E. W. Collings},
  journal= {arXiv preprint arXiv:1008.3174},
  year   = {2010}
}

Comments

12 pages, 3 figures submitted to Applied Physics Letters

Enhanced superconducting properties of pre-doped B powder type MgB2 strands

Abstract

Keywords

Cite

Comments

Related papers