Magnetic relaxation and critical current density ofMgB2thin films

A ug 2 00 1 Magnetic relaxation and critical current density of MgB 2 thin films

Magnetic relaxation and critical current density have been measured on a M gB 2 thin film in a wide region of temperature with the magnetic field up to 8 T. The irreversibility line has also been determined. It is found that the relaxation rate has a very weak temperature dependence below 1/2T c showing a clear residual relaxation rate at zero K, which cannot be easily explained as due to therm...

Enhancement of the critical current density in FeO-coated MgB2 thin films at high magnetic fields

The effect of depositing FeO nanoparticles with a diameter of 10 nm onto the surface of MgB(2) thin films on the critical current density was studied in comparison with the case of uncoated MgB(2) thin films. We calculated the superconducting critical current densities (J(c)) from the magnetization hysteresis (M-H) curves for both sets of samples and found that the J(c) value of FeO-coated film...

Magnetic relaxation in Fe-(SiO2) granular films.

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