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Pulsed Laser Deposition and Characterization of Superconducting Ba1−xKxBiO3 Thin Films

Published online by Cambridge University Press:  26 February 2011

C. E. Platt ,
M. R. Teepe ,
C. Ciofl ,
H. Zhang ,
V. P. Dravid ,
R. A. Schweinfurth ,
D. J. Van Harlingen ,
J. A. Eades ,
C. H. Lin  and
D. Strother
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C. E. Platt
Affiliation:
Science and Technology Center for Superconductivity
M. R. Teepe
Affiliation:
Science and Technology Center for Superconductivity
C. Ciofl
Affiliation:
Science and Technology Center for Superconductivity
H. Zhang
Affiliation:
Science and Technology Center for Superconductivity
V. P. Dravid
Affiliation:
Science and Technology Center for Superconductivity
R. A. Schweinfurth
Affiliation:
Science and Technology Center for Superconductivity
D. J. Van Harlingen
Affiliation:
Science and Technology Center for Superconductivity
J. A. Eades
Affiliation:
Science and Technology Center for Superconductivity
C. H. Lin
Affiliation:
Science and Technology Center for Superconductivity
D. Strother
Affiliation:
Superconductor Technologies Inc., Santa Barbara, CA 93111
R. Hammond
Affiliation:
Superconductor Technologies Inc., Santa Barbara, CA 93111
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Abstract

We report on high quality Ba1−xKxBiO3 (BKBO) thin films grown by pulsed laser deposition. The best films exhibit resistive and magnetic transition temperatures of 28 K, with a transition width of 0.4 K and critical current densities above 106 A/cm2 measured at 5 K. Surface impedance is measured to be 1 mΩ. Films are single phase and highly oriented in the (100) direction and electron diffraction shows no other phases. Analysis using Moire' fringes shows films to consist of 100 nm size dislocation-free regions which show a high degree of in-plane epitaxy.

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References

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