Fabrication of YBCO coated conductors by MOCVD method using various templates

✍ Scribed by J.-K. Choi; B.-H. Jun; C.-J. Kim

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 249 KB
• Volume: 445-448
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2006.06.005

✦ Synopsis

YBa 2 Cu 3 O 7Àx (YBCO) thin films were deposited on various buffered-templates by a metal organic chemical vapor deposition (MOCVD). Three different templates of CeO 2 /YSZ/CeO 2 /pure-Ni (CYC), CeO 2 /YSZ/Y 2 O 3 /3at.%W-Ni (YYC) and CeO 2 /IBAD-YSZ/stainless steel were used. The Ni and Ni-W alloy tapes were biaxially textured by cold rolling and annealing heat treatment. Especially, the IBAD templates with a thin CeO 2 and thick CeO 2 top layer were used to compare the current properties and the deposition nature of the YBCO on them. The dense YBCO films were grown on both the IBAD and YYC templates with no microcrack, while the YBCO films on the CYC templates were grown with the formation of microcracks and NiO. The YBCO film on the YYC template showed the higher I c than that on CYC template. Comparing the current property of the YBCO films on two IBAD templates, the YBCO film deposited on thick CeO 2 layer was better than the film on thin CeO 2 layer.