Effect of Magnetic Field and γ Irradiation on the Properties of Tl-2212 Superconducting Tape

Abstract

The critical temperature and critical current of Tl‐2212 superconducting sample in the form of a tape have been studied near Tc under magnetic field and gamma irradiation. Tc decreases from 109 to 94 K with increase of magnetic field up to 300 mT. In 77‐109 K range, Jc decreases rapidly in low fields up to around 50 mT followed by a very slow decrease in Jc up to 300 mT. Tc of the sample did not change up to 100 MR γ dose and then started to decrease from 109 to 102 K with increase of g dose up to 800 MR, most of the change taking place in high doses. The critical currents of the sample decreased steadily with γ irradiation up to 600 MR after which no further change was noticed.