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Study Of Electrical, Chemical And Structural Characteristics Of Superconductor Thin Film Obtained By Polymeric Precursors Method

Published online by Cambridge University Press:  01 February 2011

C.L. Carvalho ,
R.O. Peruzzi  and
D.R. Junior
C.L. Carvalho
Affiliation:
Departamento de Física e Química - UNESP - Ilha Solteira/SP Caixa Postal 31 Brazil
R.O. Peruzzi
Affiliation:
Departamento de Física e Química - UNESP - Ilha Solteira/SP Caixa Postal 31 Brazil
D.R. Junior
Affiliation:
Departamento de Engenharia de Materiais – FAENQUIL – Lorena / SP
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Abstract

Superconductor films of the BSCCO system have been grown by dip coating technique with good success. The chemical method allows us to grow high temperature superconductor thin films to get better control of stoichiometry, large areas and is cheaper than other methods. There is a great technological interest in growth oriented superconductor films due anisotropic characteristics of superconductor materials of high critical temperature, specifically the cuprates, as we know that the orientation may increase the electrical transport properties. Based on this, the polymeric precursor method has been used to obtain thin films of the BSCCO system. In this work we have applied that method together with the deposition technique known as dip coating to obtain Bi-based superconductor thin films, specifically, Bi1.6Pb0.4Sr2.0Ca2.0Cu3.0Ox+δ, also known as 2223 phase with a critical temperature around 110 K. The films with multilayers have been grown on crystalline substrates of LaAlO3 and orientated (100) after being heat treated around 790°C - 820°C in lapse time of 1 hour in a controlled atmosphere. XRD measurements have shown the presence of a crystalline phase 2212 with a critical temperature around 85 K with (001) orientation, as well as a small fraction of 2223 phase. SEM has shown a low uniformity and some cracks that maybe related to the applied heat treatment. WDS has also been used to study the films composition. Different heat treatments have been used with the aim to increase the percentage of 2223 phase. Measurements of resistivity confirmed the presence of at least two crystalline phases, 2212 and 2223, with Tc around 85 K and 110 K, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 848: Symposium FF – Solid-State Chemistry of Inorganic Materials V , 2004 , FF6.3
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Duzer, T.V., Turner, C.W. – Principles of superconductive devices and circuits – Prentice Hall PTR 2nd edition 1999.Google Scholar
2. Carvalho, C.L. – Thesis – Chemical Institute of Araraquara – Brazil December/1999.Google Scholar
3. Brinker, C.J. and Scherer, G.W. – Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing – Academic Press, Inc. (1990).Google Scholar
4. Brinker, C.J., Hurd, A.J., Frye, G.C., Schunk, P.R. and Ashley, C.S. – The Centennial Memorial Issue of Journal of The Ceramic Society of Japan 99 (10) (1991) 862–877.Google Scholar
5. Kakihana, M. – J. Sol-Gel Science and Technology Vol. 6 No.1 (1996) 7–55.Google Scholar
6. Carvalho, C.L., Varela, J.A. and Filho, P.N.L. – “The effect of substrate on the growth up superconducting thin films” – 1999 MRS Fall Meeting – Boston – USA pp 624.Google Scholar
7. Carvalho, C.L., Yukimitu, K., Reynoso, V.C.S., Moraes, J.C.S. and Araújo, E.B. – Synthesis of superconductor thin films using chemical method of polymeric precursors – XXV National Meeting of Condensed Matter Physics – Caxambú/MG – Brazil – 2002 May 07 – 11 pp. 583.Google Scholar
8. Carvalho, C.L., Yukimitu, K., Reynoso, V.C.S., Moraes, J.C.S. and Araújo, E.B. – Characterization of superconductor thin films by IR and X-ray spectroscopy – XV Brazilian Congress of Engineering and Materials Science – Natal/RN – Brazil – 2002 November 09 – 13 CD-Rom.Google Scholar