Abstract
Solution-based techniques have been examined as potential low-cost processes for manufacturing YBCO coated conductors. YBCO films prepared from metal trifluoroacetate precursors have achieved performance levels equaling or exceeding that of vapor deposited films with the same thickness on CeO2/YSZ(sc) substrates. Jc's of 4.5 MA/cm2 and 2 MA/cm2 have been achieved in 0.4 μm thick YBCO films on CeO2/YSZ(sc) and CeO2/YSZ/CeO2/Ni substrates, respectively. Textured Gd2O3 buffer layers have been deposited on deformation textured Ni substrates in a reel-to-reel process. The performance of YBCO films deposited on substrates containing the Gd2O3 seed layers is comparable in performance to YBCO films grown on all vacuum deposited buffer layers.
| Original language | English |
|---|---|
| Pages (from-to) | 2927-2930 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 11 |
| Issue number | 1 III |
| DOIs | |
| State | Published - Mar 2001 |
| Event | 2000 Applied Superconductivity Conference - Virginia Beach, VA, United States Duration: Sep 17 2000 → Sep 22 2000 |
Funding
The YBCO precursors were prepared as a stoichiometric part by the US. Department of Energy under Contract No. DE-FGO2-Manuscript received September 18, 2000. This work was supported in solution of yttrium, barium and copper trifluoroacetates 97ER82324. and the US. Department of Air Force under Contract No. (TFA) using techniques similar to those described by F336615-97-C-2728. The work at ORNL was sponsored by the U. S. McIntyre [7], [SI. The development of a solution-based Department of Energy, Office of Science, Division of Materials Sciences and deposition process for YBCO films was carried out on model at ORNL managed by UT-Battelle, LLC for the USDOE under Contract No. the Office of Energy Efficiency and Renewable Energy, and was performed substrates consisting of CeO,/YSZ(sc). The CeOz layers, DE-AC05-000R2272.5. typically 20 nm thick, were deposited by rf magnetron M. W. Rupich is with American Superconductor, Westborough, MA sputtering. The YBCO precursor solutions were deposited by 01581 USA (telephone: 508-836-4200, e-mail: iiirut~icli/tr!aiii~iip~~~ill~. standard spin coating techniques. Superconductor, Westborough, MA 0 1581 USA. Q. Li, S. Annavarapu, C. Thieme, and W. Zhang are with American Deposition of YBCO films on oxide buffered metal V. Prunier is with Electricite de France, Research and Development- substrates was performed with the same precursor solution ERMEL CIMA, Les Renardieres, France ( e-mail: vt~ruiiicr(tr’aiiisupcr.c(~iii). using either spin coating (short samples) or web coating (long M. Paranthaman, A. Goyal, D.F. Lee, E.D. Specht and F.A. List are with length samples). Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA Processing of the YBCO films (0.4 pm) consists of two steps. The first is the decomposition of the precursor to a The authors wish to thank M. Cima, J. Smith, M. Gopal, and L. Rigione of MIT for their on-going contributions to this work. The authors also acknowledgment the financial support of the Pirelli, the Electric Power Research Institute, the U.S Force and the U.S, Department of Energy.
Keywords
- Epitaxial layers
- High temperature superconductors
- YBaCuO