Further increase of the critical current density of MgB₂tapes with nanocarbon-doped mechanically alloyed precursor

Abstract

The combination of nanocarbon-doped nanosized MgB2 precursor powder with an inert metallic sheath of appropriate hardness gives the possibility to obtain tapes with significantly improved critical current densities at high magnetic fields. In parallel field, Jc-values of 104 A cm−2 at 16.4 T (4.2 K) and 5.6 T (20 K) could be measured.