Friday, 2C-07, 12:00-12:10

Fabrication of HTS Coated Conductors by Reactive Coevaporation

Brian Moeckly

Vladimir Matias

¹Superconductor Technologies, Inc. 460 Ward Dr., Santa Barbara, CA 93111
Phone: 805.690.4690, Fax: 805.967.0798, Email: bmoeckly@suptech.com
²Los Alamos National Laboratory, Mail Stop T004, Los Alamos, NM 87545
Phone: 505.663.5564, Fax: 505.663.5550, Email: vlado@lanl.gov

At Superconductor Technologies, Inc. we have developed the growth technique of reactive coevaporation to be a reliable, high-throughput, low-cost deposition method for production of HTS films on single-crystal substrates for RF filters. In collaboration with Los Alamos National Laboratory, we are now exploring the use of this technique for deposition of HTS thin films on IBAD-MgO Hastelloy templates for coated conductor applications. We will discuss initial results of the growth, crystallinity, and superconducting properties of HTS thin films deposited on short lengths of IBAD-MgO tapes. The in-plane misorientation of the YBCO films is less than 3 degrees and the out-of-plane orientation rivals that of YBCO deposited on single-crystal MgO substrates. Initial YBCO films grown at STI have demonstrated critical currents greater than 250 A/cm-width for 700-nm-thick films at liquid nitrogen temperature, and thick films grown at LANL by reactive coevaporation have demonstrated 950 A/cm-width. We will present results on templates with a reduced number of buffer layers. We believe this growth technique will offer substantial advantages in terms of performance and cost over competing coated conductor production methods.

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