Angular behavior of in GdBCO-coated conductors with crossed columnar defects around plane

Sueyoshi, Tetsuro*; Iwanaga, Yasuya*; Fujiyoshi, Takanori*; Takai, Yosuke*; Mukaida, Masashi*; Kudo, Masaki*; Yasuda, Kazuhiro*; Ishikawa, Norito   

We investigated in detail the flux pinning properties around B for GdBCO coated conductors with crossed columnar defects produced by heavy-ion irradiation, where the crossing angle was systematically controlled in the range from 5 to 15 relative to the ab-plane. A single peak of critical current density centered at B occurs for the crossing angle of 5, where an upward shift in can be observed compared to an unirradiated sample. As the crossing angle is larger, the peak becomes smaller and broader while maintaining the peak at B . Three peaks emerges at B and at the two irradiation angles, independently from the others.