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Preparation of YBa2Cu3O7−y films on SrTiO3 and MgO by the dipping-pyrolysis process under low-p(O2) heat treatment

Published online by Cambridge University Press:  31 January 2011

T. Manabe ,
K. Arai ,
W. Kondo ,
S. Mizuta  and
T. Kumagai
T. Manabe
Affiliation:
National Chemical Laboratory for Industry, Tsukuba, Ibaraki 305, Japan
K. Arai*
Affiliation:
National Chemical Laboratory for Industry, Tsukuba, Ibaraki 305, Japan
W. Kondo
Affiliation:
National Chemical Laboratory for Industry, Tsukuba, Ibaraki 305, Japan
S. Mizuta
Affiliation:
National Chemical Laboratory for Industry, Tsukuba, Ibaraki 305, Japan
T. Kumagai
Affiliation:
National Chemical Laboratory for Industry, Tsukuba, Ibaraki 305, Japan
*
a)On leave from Meiji University, Kawasaki, Kanagawa 214, Japan.
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Abstract

Superconducting YBa2Cu3O7−y (YBCO) films having a thickness of 1 μm were prepared on SrTiO3(100) and MgO(100) by the dipping-pyrolysis process using a low-p(O2) annealing method. Heat-treatment conditions were varied along the upper limit of the stability region of the YBCO phase. Films on SrTiO3(100) exhibited strong c-axis orientation with sharp rocking curves (FWHM = 0.8°). The highest Tc,zero of 87 K was obtained for the film heat-treated at 750 °C. On the other hand, films on MgO(100) showed broader rocking curves and their Tc's remained lower. Moreover, Ag addition was found to enhance the Tc values (Tc,zero = 91 K) of films on SrTiO3 heat-treated at 750 °C.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 9 , September 1992 , pp. 2337 - 2342
Copyright
Copyright © Materials Research Society 1992

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