Critical current density of GdBa2Cu3O7-x ceramics.

High Critical Current Density Superconductivity

This project was focused on a basic scientific problem, one that is at the heart of application and development of superconductivity for efficient energy usage. This is improvement in high current density which can only be achieved by learning to pin vortices to the physical structure of its underlying superconducting material. Quantized vortices are the tornado of electrical supercurrents, ubi...

High Critical Current Density MgB

The Effect of Spaceflight on the Critical Current Density of YBa2Cu3O7-x Thick Films

Screen-printed thick films of the YBa 2 Cu 3 O 7-x high-temperature superconductor were integrated into hybrid microelectronics circuits and characterized on orbit as part of the Materials In Devices A s Superconductors (MIDAS) spaceflight experiment. The experiment operated autonomously for 90 days on the Mir space station and acquired electrical data on the superconductive films at temperatur...

Magnetic Field Dependence of the Transport Critical Current Density in the Superconductor Family ReBa2Cu3O7-x

The magnetic field dependence of the transport critical current density has been investigated at temperatures of 78K and 68K in bulk polycrystalline samples of the hightemperature superconductor ReBa2Cu3O7-x, where Re (rare earth) = Y (yttrium), Er (erbium), Yb (ytterbium), Ho (holmium), and Dy (dysprosium). Samples were sintered in 1⁄4 inch pellet form after the conventional ceramic processing...

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....