Temperature, magnetic field, and field angular dependence of critical current of REBCO intermediate grown superconducting joint

Abstract Clarifying the critical current characteristics of high-temperature superconducting joints can contribute to the development of persistent-mode high-temperature superconducting magnets. We evaluated the temperature, magnetic field, and field angular dependence of the critical current of intermediate grown superconducting (iGS) joints formed between high-temperature superconducting REBa 2 Cu 3 O y (REBCO, RE = rare earth, y ≈ 7) tapes. The critical currents were determined by performing current decay measurements on closed-loop samples, each containing an iGS joint. The temperature, magnetic field, and field angular dependence of the critical current of the iGS joints were found to be similar to that of commercially available REBCO tapes. The critical current characteristics of iGS joints can be described using models developed for the tapes. This similarity in the characteristics can contribute to the design of persistent-mode magnets using REBCO tapes.