<i>In situ</i>MgB₂round wires with improved properties

Abstract

For technical application of high current MgB2 wires, a multifilamentary composite with small filaments and good thermal stabilization is required to avoid damage from excessive heat generation in the resistive regime above Jc. With reduced filament size, however, a degradation of Jc, due to a more and more inhomogeneous microstructure, sausaging effects and a reaction layer between filament and sheath, usually increases dramatically.