Transport versus magnetization technique for determination of critical current densities in superconducting tapes with macroscopic defects

We show with the help of simulations that the critical current densities determined from magnetization and transport measurements are modified differently by the presence of macroscopic defects in a superconducting flat conductor like thin film or tape. A particular double-slot geometry, reminiscent of a superconducting tape with transversal cracks, is considered for the simulations, allowing us to analyse systematically how the critical current densities determined in an inductive and transport way change as a function of the size and relative position of the defects within the tape. The differences in the critical current densities obtained from both methods are discussed.