LAUSR

Abstract In the present study, in order to clarify the electrical and mechanical properties of the junction of superconducting wires, a junction was numerically simulated using the finite element method, and the electrical and mechanical properties were evaluated. We used a 1 µm-thick YB a 2 C u 3 O 7 − δ superconducting coated conductor to act as a superconducting wire and joined two films together for current density simulation. The magnetic field dependence of the critical current density is based on the experimental results for YB a 2 C u 3 O 7 − δ . We introduced a crack in the superconducting junction and confirm that the critical current is drastically reduced by increasing the width of crack. We then attempted to reinforce the crack using solder and superconducting film. The effectiveness of reinforcement of Ic was clarified using very thin solder or a silver diffusion junction.