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Microstructure of laser-ablated superconducting La2CuO4Fx thin films on SrTiO3

Published online by Cambridge University Press:  31 January 2011

G. Kong ,
M. O. Jones ,
J. S. Abell ,
P. P. Edwards ,
S. T. Lees ,
K. E. Gibbons ,
I. Gameson  and
M. Aindow
G. Kong
Affiliation:
School of Metallurgy and Materials, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
M. O. Jones
Affiliation:
School of Metallurgy and Materials, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
J. S. Abell
Affiliation:
School of Metallurgy and Materials, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
P. P. Edwards*
Affiliation:
School of Chemistry and the School of Metallurgy and Materials, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
S. T. Lees
Affiliation:
School of Chemistry, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
K. E. Gibbons
Affiliation:
School of Chemistry, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
I. Gameson
Affiliation:
School of Chemistry, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
M. Aindow
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, 97 North Eagleville Road, Unit 3136, University of Connecticut, Storrs, Connecticut 06269–3136
*
b) Address all correspondence to this author.
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Abstract

Thin films of lanthanum cuprate were grown on SrTiO3 substrates by pulsed laser deposition and made superconducting (Tc ∼ 38 K) through the process of post-deposition fluorination using elemental fluorine. A microstructural analysis showed that the [110] zone of the film grows parallel to the [100] zone of the SrTiO3 substrate, reducing the lattice mismatch from 37.5% to 2.4%. At the film–substrate interface there is an intermediate layer 3–4 nm thick and twin-related grains emanate from this region. Stacking faults are present in the bulk of the film, with misoriented subgrains present at the deposit surface.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 11 , November 2001 , pp. 3309 - 3316
Copyright
Copyright © Materials Research Society 2001

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