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Improvement in Crystal Orientation and In-plane Alignment of La-doped YBCO Thin Film on BaZrO3-buffered MgO Substrate

Published online by Cambridge University Press:  01 June 2005

Ai Kamitani ,
S. Adachi ,
H. Wakana  and
K. Tanabe
Ai Kamitani
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
S. Adachi
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
H. Wakana
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
K. Tanabe
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
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Abstract

Y0.9Ba1.9La0.2Cu3Oy (La-YBCO) thin films were prepared by an off-axis magnetron sputtering method on MgO substrates with and without a BaZrO3 buffer layer. Insertion of BaZrO3 buffer layer was effective for obtaining La-YBCO films with pure c-axis orientation and in-plane alignment at low temperatures below 600 °C. We prepared La-YBCO thin films on BaZrO3-buffered MgO substrates using a temperature-gradient method, in which a template La-YBCO layer was first deposited at 600 °C, and then the temperature was continuously raised to 700 °C. By this method, La-YBCO thin films with improved crystallinity were successfully prepared. It was also proved that the insertion of the BaZrO3 buffer layer enables us to prepare high-quality La-YBCO films with high reproducibility.

Keywords

SuperconductorThin film
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 6 , June 2005 , pp. 1529 - 1535
Copyright
Copyright © Materials Research Society 2005

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References

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