Current-voltage characteristics in YBaCuO thin films over more than 13 decades of electric-fields

Combining the four-probe method and the magnetization method, we have measured electric-field vs. current-density (E-J) characteristics in YBa2Cu3O7-delta thin films over more than 13 decades of electric-fields. It has been shown that the EJ curves obtained by the both methods lie on a continuous line each other. Furthermore, it has been pointed out that the scaling of EJ curves is valid only in a limited range of electric-field. That is to say, S-like-shape InE-lnJ curve can be observed even in the so-oiled glass regime.