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Direct growth of LaMnO3 cap buffer layers on ion-beam-assisted deposition MgO for simplified template-based YBa2Cu3O7−δ-coated conductors

Published online by Cambridge University Press:  31 January 2011

O. Polat ,
T. Aytug ,
M. Paranthaman ,
K. Kim ,
Y. Zhang ,
J.R. Thompson ,
D.K. Christen ,
X. Xiong  and
V. Selvamanickam
O. Polat
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831; and Department of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200
T. Aytug*
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
M. Paranthaman
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
K. Kim
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Y. Zhang
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
J.R. Thompson
Affiliation:
Department of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200; and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
D.K. Christen
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
X. Xiong
Affiliation:
SuperPower, Inc., Schenectady, New York 12304
V. Selvamanickam
Affiliation:
SuperPower, Inc., Schenectady, New York 12304
*
a)Address all correspondence to this author. e-mail: aytugt@ornl.gov
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Abstract

Simplification of the ion-beam-assisted deposition (IBAD) buffer architecture is one of the key issues for reduced manufacturing cost of second-generation superconducting wire production. In this work, we studied various radio frequency magnetron sputter deposition conditions for epitaxial growth of LaMnO3 (LMO) layers, with varying thicknesses, directly on IBAD-MgO without homo-epitaxial MgO layers. Performance of the simplified LMO/IBAD-MgO samples was qualified by pulsed-laser-deposited 1-μm-thick YBa2Cu3O7−δ (YBCO) coatings. Detailed property characterizations revealed that though the growth temperature has a substantial effect on the texture of LMO layers, neither LMO thickness nor different sputter gas compositions had a significant effect on the performance of YBCO films. The superconducting properties of YBCO on LMO/IBAD-MgO are found to be similar to those obtained on templates having homo-epitaxial MgO layers. The present results underscore the strong potential of LMO as a single cap layer directly on IBAD-MgO for the development of a simplified IBAD architecture.

Keywords

SputteringSuperconductingThin film
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 11 , November 2008 , pp. 3021 - 3028
Copyright
Copyright © Materials Research Society 2008

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References

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