Towards the practical PLD-IBAD coated conductor fabrication -: Long wire, high production rate and Jc enhancement in a magnetic field

SRL-Nagoya Coated Conductor Center (NCCC) have succeeded in fabricating stably long coated conductor using ion-beam assisted deposition (IBAD) and pulsed laser deposition (PLD) methods. Reel-to-reel PLD equipment with a multi-plume and multi-turn deposition system (MPMT PLD) resulted in a long coated conductor with a high critical current, I-c, of 245 A and length of 212.6 in. I-c x L (length) reached the record of 52,087 A in. At the same time, the effort to enhance I-c and J(c) in a magnetic filed are also carried out using artificial pinning center and RE element: YSZ mixed Y123 target brought about a high J(c) especially in the magnetic field parallel to the c-axis. This was attributed to a columnar structure of the "bamboo structure" (BaZrO3/Y123 layer-stacked structure) in Y123 + YSZ sample. Gd123 was also found to be effective for enhancing pinning properties, which was considered to be due to the native stacking faults in the 123 structure. The combination of Gd element and YSZ introduction were also studied and clearly demonstrated the improvement of the anisotropy of J(c) for a magnetic field angle. (c) 2006 Elsevier B.V. All rights reserved.