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

Autor:	Susner, M. A., Yang, Y., Sumption, M. D., Rindfleisch, M. A., Tomsic, M. J., Marzik, J. V., Collings, E. W.
Rok vydání:	2010
Předmět:	Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
Popis:	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. Comment: 12 pages, 3 figures submitted to Applied Physics Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1008.3174 View this record from Arxiv