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Thickness control of solution deposited YBCO superconducting films by use of organic polymeric additives

Published online by Cambridge University Press:  31 January 2011

S. Morlens ,
N. Romà ,
S. Ricart ,
A. Pomar ,
T. Puig  and
X. Obradors
S. Morlens
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
N. Romà
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
S. Ricart*
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
A. Pomar
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
T. Puig
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
X. Obradors
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB) C.S.I.C., Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
*
a)Address all correspondence to this author. e-mail: ricart@icmab.es
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Abstract

We show that the thickness of yttrium–barium–copper–oxide (YBCO) superconducting films grown from trifluoroacetate precursors can be strongly modified using polymeric additives, while deposition conditions by spin or dip coating remain unchanged. A screening of different families of organic additives has been performed, and the best results have been achieved using polymers having an oxygen functionalized backbone. Two different polymeric additives, polyvinyl pyrrolidone (PVP) and poly(ethylene glycol) (PEG), have been more thoroughly investigated, and thermal analysis suggests that PEG is the most promising alternative because the pyrolysis step of the new complex precursors remains sharp and narrow and hence the final homogeneity of the film is preserved. The combination of anhydrous trifluoroacetic acid (TFA) solutions and poly(ethylene-glycol) (PEG8000) as additive can produce an increase of the YBCO film thickness up to 300%, while keeping a fast pyrolysis process and high critical current densities.

Keywords

Metalorganic depositionPolymerSuperconducting
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2330 - 2338
Copyright
Copyright © Materials Research Society 2007

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References

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