Pair-breaking critical current density of magnesium diboride

Pair-breaking critical current density of magnesium diboride

We report the investigation of the pair-breaking current density jd in magnesium diboride. At low current densities j, the transition temperature Tc shifts in the classic DTc( j)/Tc(0)}2@ j / jd(0)# 2/3 manner, with a projected jd(0)'2310 7 A/cm. Current-voltage curves at fixed temperatures yield a similar value for jd(0), with an overall jd(T) dependence consistent with Ginzburg-Landau theory....

Critical flux pinning and enhanced upper critical field in magnesium diboride films

We have conducted pulsed transport measurements on c-axis-oriented magnesium diboride films over the entire relevant ranges of magnetic field 0&H&Hc2 ~where Hc2 is the upper critical field! and current density 0& j& jd ~where jd;10 7 A/cm is the depairing current density!. The intrinsic disorder of the films combined with the large coherence length and three dimensionality, compared to cuprate ...

Superconducting Properties of Graphene Doped Magnesium Diboride

Superconductivity of Magnesium Diboride: Theoretical Aspects

Fabrication of Chemically Doped, High Upper Critical Field Magnesium Diboride Superconducting Wires

Controlled chemical doping of magnesium diboride (MgB2) has been shown to substantially improve its superconducting properties to the levels required for high field magnets, but the doping is difficult to accomplish through the usual route of solid state reaction and diffusion. Further, superconducting cables of MgB2 are difficult to fabricate because of the friable nature of the material. In t...