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Raman studies of reactive DC-magnetron sputtered thin films of YBaCuO on MgO

Published online by Cambridge University Press:  31 January 2011

K. C. Sheng ,
S. J. Lee ,
Y. H. Shen ,
X. K. Wang ,
E. D. Rippert ,
R. P. Van Duyne ,
J. B. Ketterson  and
R. P. H. Chang
K. C. Sheng
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
S. J. Lee
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
Y. H. Shen
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
X. K. Wang
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
E. D. Rippert
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
R. P. Van Duyne
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
J. B. Ketterson
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
R. P. H. Chang
Affiliation:
Materials Research Center, Northwestern University, Evanston, Illinois 60208
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Abstract

Raman spectroscopy was employed to study Y–Ba–Cu–O films prepared by multilayer, reactive sputtering from separate Y, Cu, and Ba0.5Cu0.5 targets. A set of films having the composition YxBa2CuyOz with 0.7 < x < 1.8 and 2.8 < y < 3.5 and critical temperature with zero resistance, Tc(R = 0), ranging from 25 to 90 K was studied with the Raman technique. The correlation between Raman data and critical temperature, Tc, was investigated. This technique provides important information concerning the film crystallinity, homogencity, and impurity content (including other phases) which is useful in judging the quality of high Tc superconducting films. We also found that the rapid thermal annealing process is a very efficient way to reduce chemical reactions between the film and the substrate.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 6 , December 1989 , pp. 1312 - 1319
Copyright
Copyright © Materials Research Society 1989

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References

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