Critical current density in Ag/YBa2Cu3Oxand PrBa2Cu3Oy/YBa2Cu3Oxmultilayers

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

Improved Critical-Current-Density Uniformity by Using Anodization

We discuss an anodization technique for a Nb superconductive-electronics-fabrication process that results in an improvement in critical-current-density uniformity across a 150-mm-diameter wafer. We outline the anodization process and describe the metrology techniques used to determine the NbO thickness grown. In the work described, we performed critical current measurements on Josephson junctio...

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....

Distinct doping dependence of critical temperature and critical current density in Ba1−xKxFe2As2 superconductor

Since the high transition temperature (High-Tc) superconductivity was discovered in the series of materials containing iron (Fe), their potential for the applications has been extensively scrutinized. In particular, a lot of effort has been made in achieving the high current-carrying ability by revealing the vortex pinning behavior. Here, we report on the critical current density (Jc) for the p...