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Superconducting YBCO Films Prepared by Electrodeposition and Spray Pyrolysis

Published online by Cambridge University Press:  01 February 2011

S. Phok ,
P.D. Spagnol ,
T. Chaudhuri  and
R.N. Bhattacharya
S. Phok
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO 80401, USA
P.D. Spagnol
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO 80401, USA
T. Chaudhuri
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO 80401, USA
R.N. Bhattacharya
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO 80401, USA
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Abstract

Biaxially textured YBa2Cu307-δ films were fabricated by non-vacuum electrodeposition and spray pyrolysis techniques. Electrodeposited YBCO was prepared on sputtered copper/single-crystal substrates. Electrodeposition was carried out at constant voltage and the deposition was completed in only few minutes. The thickness of the as-deposited films was in the range of 0.6 to 2 μm. The optimized sputtered copper layer thickness was about 200 Å on SrTiO3. In the spray pyrolysis method, the solution is sprayed directly onto SrTiO3 substrates. The substrate temperature is about 100°C. The thickness of the as-deposited films was in the range of 1.2 to 2μm. The electrodeposited and spray-deposited films were annealed at temperatures ranging from 800° to 920°C under various flowing gas mixtures. X-ray diffraction analysis revealed that processed electrodeposited and spray-deposited films were biaxially textured, where YBCO grains were well oriented along the c-axis and in the (a,b) plane. Δω, deduced from the rocking curve on the (005) reflection, was as low as 0.46°. Δφ, deduced from the phi-scan on the (103) reflection, was as low as 0.54°. The critical current density for these types of films is about 0.5 MA/cm2at 77 K and 0 T.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 868: Symposium C – Recent Advances in Superconductivity - Materials Synthesis, Multiscale Characterization and Functionally Layered Composite Conductors , 2005 , C5.6
Copyright
Copyright © Materials Research Society 2005

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References

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