Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Volume 23, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-2048/23/1/014018
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Funding
- Department of Energy Office of Electricity Delivery and Energy Reliability
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We demonstrate coated conductors fabricated by reactive co-evaporation of YBa(2)Cu(3)O(y) (YBCO) by cyclic deposition and reaction (RCE-CDR) on ion-beam-assisted-deposition-(IBAD-) textured templates simplified by the elimination of the epitaxial buffer layer. Hastelloy substrates, both polished and unpolished, were used as a starting material for the IBAD templates. Y(2)O(3) bed layers were then deposited followed by IBAD- textured MgO and a thin homoepitaxial MgO layer. The MgO-terminated templates were used for direct deposition of YBCO by RCE-CDR. Critical current densities obtained for the undoped YBCO material are comparable to the best values measured previously with the use of LaMnO(3) or SrTiO(3) epitaxial buffer layers and state-of-the-art coated conductor results. The structural characterization data indicate a well oriented YBCO film with a robust template. Electrical measurements also indicate no weak links and a typical magnetic field behavior of undoped YBCO, characterized by a low density of naturally occurring strong pinning centers and correlations along the ab direction.
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