We have investigated electric field vs. current density(E-J) characteristics of Gd1Ba2Cu3O7-δ coated conductor over a wide range of E by deriving from magnetization relaxation and transport four-probe measurements. We succeeded in obtaining E-J characteristics between10-2 to 5×10-11 V/m, and analyzed the results within a frame work of the percolation transition model taking into account flux creep with a distribution of activation energy. This allows us to describe E-J characteristics as well as magnetic relaxation analytically based on the transport measurements. Clear deviation from the n-value model has also been confirmed from the experimental results.
Onodera, Y., Kiss, T., Gangi, S., Imamura, K., Higashikawa, K., Inoue, M., … Izumi, T. (2015). Critical current density in Gd1Ba2Cu3O7-δ coated conductor under the influence of flux creep. In Physics Procedia (Vol. 67, pp. 926–930). Elsevier B.V. https://doi.org/10.1016/j.phpro.2015.06.156