Current transport property in GdBCO coated conductor with artificial pinning centers in a wide range of temperature, magnetic field up to 27 T, and field angle

We have investigated current transport property in Gd1Ba2Cu3O7-δ coated conductor with artificial pinning centers in a wide range of temperature, magnetic field, B up to 27 T, and field angle. Due to the additional c-axis correlated pins, critical current density, Jc in B//c was enhanced and the improvement was observed in wide range of B. On the other hand, around B-perpendicular c below 65 K, the angular dependence of n-value showed a valley-like behavior, although the Jc was increasing. In addition, the temperature dependence of the pinning force density defined as Jc x B was not scaled on an expected master curve. These results indicate the pinning in B-perpendicular c is governed by different mechanism below 65 K and high magnetic field.