Flux pinning properties of splayed columnar defects ranging from -axis to -plane in GdBCO coated conductors

Sueyoshi, Tetsuro*; Furuki, Yuichi*; Kai, Takashi*; Fujiyoshi, Takanori*; Ishikawa, Norito

Physica C, 504, p.53 - 56, 2014/09

https://doi.org/10.1016/j.physc.2014.02.012

GdBaCuO (GdBCO) coated conductors were irradiated using 270 MeV Xe ions at crossing angles relative to the -axis, in order to clarify the flux pinning properties of splayed columnar defects (splayed CDs) not only around -axis, but also around -plane. For the splayed CDs with smaller (i.e. crossing around the -axis), a single peak is observed around -plane in the angular dependence of critical current density , which are attributed to the splay effect by the crossed CDs. For the splayed CDs with larger (i.e. crossing around the -plane), on the other hand, two sharp peaks emerge near two irradiation angles and the at -plane indicates not a peak but a dip structure.