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Reactive Co-Evaporation of YBCO for 2G HTS Tapes

Published online by Cambridge University Press:  17 March 2011

Jonathan Storer ,
Jens Hänisch ,
Chris Sheehan  and
Vladimir Matias
Jonathan Storer
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, TA-3 4200 drop point 01U, Los Alamos, NM, 87545
Jens Hänisch
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, TA-3 4200 drop point 01U, Los Alamos, NM, 87545
Chris Sheehan
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, TA-3 4200 drop point 01U, Los Alamos, NM, 87545
Vladimir Matias
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, TA-3 4200 drop point 01U, Los Alamos, NM, 87545
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Abstract

We present a new reel-to-reel method for growth of high temperature super-conducting (HTS) films by reactive co-evaporation on flexible metal tapes. We have demonstrated proof of principle for this method with a small laboratory-scale setup using 8 cm long tape pieces. YBa2Cu3O7-δ is deposited on ion-beam assisted deposition textured MgO layers on top of flexible polycrystalline metal tapes. Critical current densities at 75.5 K of over 2 MA/cm2 have been achieved in HTS films with over 2 μm in thickness, yielding a self field critical current of 450 A/cm-width. A 4.5 μm thick film had a self field critical current of 590 A/cm. We discuss some practical possibilities for manufacturing of superconducting wire using this process and present new areas of research that are still needed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1001: Symposium M – Progress in High-Temperature Superconductors , 2007 , 1001-M14-02
Copyright
Copyright © Materials Research Society 2007

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