Abstract
Effect of 28 MeV electron irradiation was investigated on the critical current density (Jc) of high-Tc superconductor Ba2YCu3O7-δ thin films. For the film irradiated with a fluence of 4.7×1016 electrons/cm2, Jc determined from I-V characteristics at temperatures from 75 to 85 K was enhanced by about 8%. The enhance ratio of Jc due to irradiation increased with fluence over the range investigated, while the critical temperature (Tc) was unchanged. The temperature dependence of Jc was not affected by electron irradiation.