Abstract
Fabrication of epitaxial, high-Jc, biaxially aligned YBCO thick films on rolling-assisted biaxially-textured substrates (RABiTS) is summarized. The RABiTS technique utilizes standard thermomechanical processing to obtain long lengths of flexible, biaxially oriented substrates with smooth surfaces (rms ∼ 50 nm). The strong biaxial texture of the metal (in-plane 6-7° FWHM) is conferred to the superconductor by deposition of intermediate metal and/or oxide layers which serve both as a chemical as well as a structural buffer. Epitaxial YBCO films grown using laser ablation on RABiTS™ have critical current densities exceeding 106 A cm-2 at 77 K in zero-field and have field dependences similar to epitaxial films on single crystal ceramic substrates. The texture of the base metal has been achieved in lengths over 1 m and scaleable techniques are being pursued to deposit epitaxial multilayers. Deposited conductors made using this technique offer a potential route for the fabrication of long lengths of high-Jc wire capable of carrying high currents in high magnetic fields and at elevated temperatures.
Original language | English |
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Pages (from-to) | 403-427 |
Number of pages | 25 |
Journal | Applied Superconductivity |
Volume | 4 |
Issue number | 10-11 |
DOIs | |
State | Published - Oct 1 1996 |
Funding
The authors would like to thank R. A. Hawsey for reviewing this manuscript. The authors would also like to thank R. K. Williams for his assistance in annealing samples and for reviewing this manuscript. The authors thank D. Moon, Westinghouse Electric Corporation and J. Hack, Midwest Superconductivity, Inc. for allowing use of data obtained on their samples. The research was sponsored by the U.S. Department of Energy, the Office of Efficiency and Renewable Energy, the Office of Utility Technology–Superconductivity Program and the Office of Energy Research, Basic Energy Sciences, managed by Lockheed–Martin Energy Research Corporation for the U.S. Department of Energy under contract DE-AC05-96OR22464.