Investigation and Comparison of Critical Current on Magnetic and Nonmagnetic HTS Tape Under Controllable Current Ramp Rate

A key factor concerning the superconducting application of HTS tapes is the volume of current they can carry. The resistivity of the HTS tape is theoretically zero if lower than the critical temperature, but it cannot carry an infinitely large current. Therefore, the critical current of different HTS tapes must be evaluated to determine their maximum current carrying capacity. First, this study proposed an experimental structure based on controllable dc current ramp rate (R-value) and the critical current of three kinds of tapes were measured, respectively. Finally, this research provides new insight into the understanding of HTS tapes with the magnetic substrates and the nonmagnetic substrates.