NDLI: Strategic Buffer Layer Development for YBCO Coated Conductors

Content Provider	IEEE Xplore Digital Library
Author	Paranthaman, M. Aytug, T. Kyunghoon Kim Specht, E.D. Heatherly, L.
Copyright Year	2002
Abstract	We have developed a simplified buffer layer architecture for the rolling-assisted biaxially textured substrates (RABiTS) template approach. The overall purpose of this research is to enable potentially a low-cost, high throughput and high yield manufacturing processes for buffer fabrication and to gain fundamental understanding of the growth of buffer layers for RABiTS templates. This understanding is critical to the development of a reliable, robust, and long-length manufacturing process for second generation wires. In this study, efforts are being made to either reduce the number of vacuum deposited layers or to replace one or more of these vacuum deposited layers with a solution based layer. We have chosen Gd₂O₃ - ZrO₂ system as a potential barrier layer for this study. We have deposited epitaxial Gadolinia Stabilized Zirconia (GSZ) (Zr_1-xGd_xOy; x = 0-1) films on 30-nm thick e-beam evaporated Y₂O₃ seeded Ni-W (3 at. %) (Ni-3W) substrates using a metal-organic decomposition (MOD) process. Detailed X-ray studies indicated that all of the MOD-GSZ layers were cube textured and both in-plane and out-of-plane lattice parameters increases linearly with increasing the Gd content. We have also developed process conditions for reactively sputter deposited epitaxial Gd₂Zr₂O₇ (Gadolinium Zirconium Oxide (GZO); Zr_1-xGd_xO_y (x = 0.5)) films on the e-beam evaporated Y₂O₃/Ni - 3W substrates. YBCO films with a critical current density J_c of 2.14 times 10⁶ A / cm² and 1.4 times 10⁶ A / cm² at 77 K and self-field were grown on the newly developed architectures of Gd₂Zr₂O₇/Y₂O₃/Ni - 3W and Zr_1-xGd_xO_y (x = 0.2)/Y₂O₃/Ni - 3W substrates, respectively using a pulsed laser deposition (PLD) process. This work promises a route for producing cost-effective simplified buffer architectures for the RABiTS-based YBCO coated conductors.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3303
Ending Page	3306
Page Count	4
File Size	451199
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Buffer layers Yttrium barium copper oxide Conductors Zirconium Substrates Manufacturing processes Throughput Fabrication Robustness Wires YBCO coated conductors metal organic deposition reactive sputtering transport property measurements
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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