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Flexible stainless steel foil as a substrate for superconducting Y-Ba-Cu-O films

Published online by Cambridge University Press:  31 January 2011

S. Witanachchi
Affiliation:
New York State Institute on Superconductivity, State University of New York at Buffalo, 330 Bonner Hall, Buffalo, New York 14260
S. Patel
Affiliation:
New York State Institute on Superconductivity, State University of New York at Buffalo, 330 Bonner Hall, Buffalo, New York 14260
Y. Z. Zhu
Affiliation:
New York State Institute on Superconductivity, State University of New York at Buffalo, 330 Bonner Hall, Buffalo, New York 14260
H. S. Kwok
Affiliation:
New York State Institute on Superconductivity, State University of New York at Buffalo, 330 Bonner Hall, Buffalo, New York 14260
D. T. Shaw
Affiliation:
New York State Institute on Superconductivity, State University of New York at Buffalo, 330 Bonner Hall, Buffalo, New York 14260
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Abstract

As-deposited superconducting Y-Ba-Cu-O films have been grown on stainless steel substrates by the plasma assisted laser deposition technique. Low interfacial diffusion of iron at the 550°C growth temperature enables us to produce superconducting films with critical temperatures up to 83 K and critical currents up to ∼4 × 103 A/cm2 (40 K). Dependence of the superconducting properties of the Y-Ba-Cu-O films on the surface condition of the mirror finished stainless steel substrate has been studied. Critical temperature and critical current of the films have been improved by heat-treating the substrate and incorporating buffer layers. Variation of the critical current with the bend radii of the film is discussed.

Type
Articles
Copyright
Copyright © Materials Research Society 1990

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References

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