2004/09/10 by M D Sumption, M. D. Sumption, M Bhatia +9 · 45 citations
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Critical current #Current (fluid) #Physics of Superconductivity and Magnetism #Stabilizer (aeronautics) #Stack (abstract data type) #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/18/5/026
published in Superconductor Science and Technology 18(5), 730-734 (IOP Publishing) · 10 pages, 3 figs, 2 tables
arxiv created 2004/09/10 · openalex publication_date 2005/04/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Transport critical current densities and n-values were measured at 4.2 K in fields up to 15 T on 7, 19, and 37-stack multifilamentary MgB2 strands made using an in-situ route. Some strands included SiC additions (particle size 30 nm), while in others Mg-rich compositions were used. Two basic multifilamentary variants were measured, the first had Nb filamentary barriers, the second had Fe filamentary barriers. All samples incorporated stabilizer in the form of Cu 101. Simple, one-step heat treatments were used, with temperatures ranging from 700-800C, and times from 10-30 minutes. Transport critical current densities of 1.75 x 105 A/cm2 were seen at 4.2 K and 5 T in 37 stack strands.