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Crystallization of YBa2Cu3O7-y films on SrTiO3(100) by postannealing of precursors prepared by dipping-pyrolysis process

Published online by Cambridge University Press:  03 March 2011

T. Manabe ,
W. Kondo ,
S. Mizuta  and
T. Kumagai
T. Manabe
Affiliation:
National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan
W. Kondo
Affiliation:
National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan
S. Mizuta
Affiliation:
National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan
T. Kumagai
Affiliation:
National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan
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Extract

The effects of annealing temperature and oxygen partial pressure [p(O2)] were investigated on the crystallization and orientation of superconducting YBa2Cu3O7-y (YBCO) films on SrTiO3(100) prepared by the dipping-pyrolysis process. Annealing conditions for precursor films consisting of a Y2O3—BaCO3—CuO mixture were varied in the temperature range 700–850 °C and initial p(O2) range 2 × 10-4-10-2 atm followed by pure O2 treatment. Three different types of crystallization behavior were observed. The c-axis-oriented epitaxial YBCO films were obtained on the lower p(O2) and higher temperature side in the p(O2)-T diagram. The c/a-axis-oriented growth was observed in films heat-treated at 750–800 °C under p(O2) of 10-3 atm. In addition, mixtures of YBCO and YBa2Cu4O8 resulted when the films were annealed at 700 °C.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 4 , April 1994 , pp. 858 - 865
Copyright
Copyright © Materials Research Society 1994

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References

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