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Superconducting YBa2Cu3Ox films prepared by rf plasma flash evaporation

Published online by Cambridge University Press:  31 January 2011

S. Yuhya ,
K. Kikuchi ,
Y. Shiohara ,
K. Terashima  and
T. Yoshida
S. Yuhya
Affiliation:
Superconductivity Research Laboratory, ISTEC, 10–13 Shinonome, Koto-ku, Tokyo 135, Japan
K. Kikuchi
Affiliation:
Superconductivity Research Laboratory, ISTEC, 10–13 Shinonome, Koto-ku, Tokyo 135, Japan
Y. Shiohara
Affiliation:
Superconductivity Research Laboratory, ISTEC, 10–13 Shinonome, Koto-ku, Tokyo 135, Japan
K. Terashima
Affiliation:
Department of Metallurgy and Materials Science, Faculty of Engineering, The University of Tokyo, 7–3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
T. Yoshida
Affiliation:
Department of Metallurgy and Materials Science, Faculty of Engineering, The University of Tokyo, 7–3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Abstract

Superconducting YBa2Cu3Ox films were prepared by rf plasma flash evaporation on MgO(100) single crystals. 4 MHz rf Ar–O2 plasma was used and Y–Ba–Cu–O (YBCO) powder as raw material was fed into the plasma. The growth rate of 730 nm/min was achieved. Texture of the grown films varied from a-axis orientation to c-axis with increasing growth temperature and decreasing growth rate. The films without heat treatment exhibited zero resistance temperature (Tc0) more than 77 K. The deposited films using the stoichiometric powder were slightly poor in Y. The sample using Y-rich powder revealed nearly stoichiometric composition and exhibited a Tc0 of 90.6 K and a critical current density (Jc) of 6.8 × 105 A/cm2 at 77 K in zero applied field.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 10 , October 1992 , pp. 2673 - 2679
Copyright
Copyright © Materials Research Society 1992

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References

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