In this work, the development of a superconducting joint between GdBa 2 Cu 3 O 7−x -based secondgeneration high temperature superconducting tapes using a thin YBa 2 Cu 3 O 7−x intermediate layer is presented. The critical current of the superconducting joint was 18 A, which is about 30% of the current in the original tape. The persistent field decay of the one-turn loop showed a joint resistance of less than 6•10 −13 Ω at 77 K.

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