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Synthesis of single phase YBa2Cu3O7−x thin films from a Y-Ba-Cu metallic precursor by a low-temperature annealing

Published online by Cambridge University Press:  03 March 2011

Takashi Hase ,
Ryusuke Kita ,
Kenichi Kawaguchi ,
Takeshi Koga  and
Tadataka Morishita
Takashi Hase
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10–13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
Ryusuke Kita
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10–13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
Kenichi Kawaguchi
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10–13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
Takeshi Koga
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10–13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
Tadataka Morishita
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10–13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
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Abstract

YBa2Cu3O7−x (YBCO) superconducting thin films that show no x-ray diffraction peaks due to any other non-superconducting phases have been synthesized by annealing Y-Ba-Cu-O amorphous precursors at 750 °C. The Y-Ba-Cu-O precursors have been fabricated by oxidizing Y-Ba-Cu metallic precursors coevaporated from Y, Ba, and Cu metallic sources under ultrahigh vacuum conditions. Crystallization behavior from the Y-Ba-Cu-O precursor to YBCO films drastically depends on an oxidation temperature for the Y-Ba-Cu metallic precursor. YBCO thin film synthesized from the precursor oxidized at an optimum temperature shows a zero resistance temperature of over 80 K and a very smooth surface.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 6 , June 1994 , pp. 1337 - 1342
Copyright
Copyright © Materials Research Society 1994

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References

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