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Texture and transport in spray pyrolyzed TlBa2Ca2Cu3O9 thick films

Published online by Cambridge University Press:  03 March 2011

J.E. Tkaczyk ,
J.A. Sutliff ,
J.A. DeLuca ,
P.J. Bednarczyk ,
C.L. Briant ,
Z.L. Wang ,
A. Goyal ,
D.M. Kroeger ,
D.H. Lowndes  and
E.D. Specht
J.E. Tkaczyk
Affiliation:
General Electric Research and Development, Schenectady, New York 12301
J.A. Sutliff
Affiliation:
General Electric Research and Development, Schenectady, New York 12301
J.A. DeLuca
Affiliation:
General Electric Research and Development, Schenectady, New York 12301
P.J. Bednarczyk
Affiliation:
General Electric Research and Development, Schenectady, New York 12301
C.L. Briant
Affiliation:
General Electric Research and Development, Schenectady, New York 12301
Z.L. Wang
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
A. Goyal
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
D.M. Kroeger
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
D.H. Lowndes
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
E.D. Specht
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Abstract

The electron backscattering pattern technique has been applied to the microstructural investigation of Tl(1223) thick films formed by vapor-phase thallination of Ag-containing Ba–Ca–Cu–oxide precursors. For samples grown on polycrystalline YSZ, considerable biaxial alignment is found in localized, multigrain regions as wide a 100 μm or more. However, on scales above 1 mm the overall texture remains only uniaxial with the c-axes (i.e., [001]) aligned perpendicular to the plane of the substrate. On single-crystal KTaO3 an epitaxial relationship is evident which persists to the surface of a 3 μm thick film. Modest variations in the processing protocol yield films containing grains oriented with the c-axis in the plane, resulting in the degradation of transport properties. The data suggest a growth mode in which sparse nucleation occurs at the substrate followed by rapid lateral crystallization.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 9 , September 1995 , pp. 2203 - 2210
Copyright
Copyright © Materials Research Society 1995

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References

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