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Texture Formation and Superconducting Properties of YBa2Cu3Ox Thin Films Prepared by Solution Process on LaAlO3 Single Crystals

Published online by Cambridge University Press:  18 March 2011

Y.-A Jee ,
B. Ma ,
M. Li ,
B. L. Fisher  and
U. Balachandran
Y.-A Jee
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A.
B. Ma
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A.
M. Li
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A.
B. L. Fisher
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A.
U. Balachandran
Affiliation:
Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, U.S.A.
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Abstract

YBa2Cu3Ox (YBCO) thin films were fabricated by the trifluoroacetate (TFA) process on LaAlO3 (LAO) single crystal in an argon atmosphere. We focused on lowering the heat treatment temperature by decreasing the oxygen partial pressure to adopt the TFA process to metallic substrates. YBCO phase formation was checked by measuring Tc with the inductive method. In-plane and out-of-plane film textures were evaluated by phi-scan and omega scan, respectively. Raman spectroscopy was used to estimate grain connectivity, in-plane texture, and second-phase formation of the films. Although Raman spectroscopy revealed some evidence of cation disorder, the film prepared at 750°C shows a sharp superconducting transition at 91 K and critical current density of 1.3 MA/cm2 at 77 K. Optimal heat treatment temperature was 750°C in the argon atmosphere, which is consistent with the thermodynamic estimate that heat treatment temperature decreases as oxygen partial pressure decreases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 659: Symposium II – High-Temperature Superconductors-Crystal Chemistry, Processing & Properties , 2000 , II9.17
Copyright
Copyright © Materials Research Society 2001

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