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

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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.

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Authors and Affiliations

  1. Superconductivity Research Laboratory, International Superconductivity Technology Center, Tokyo, 10–13 Shinonome, 1-Chome, 135, Koto-Ku, Japan

    Takashi Hase, Ryusuke Kita, Kenichi Kawaguchi, Takeshi Koga & Tadataka Morishita

Authors
  1. Takashi Hase
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  2. Ryusuke Kita
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  3. Kenichi Kawaguchi
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  4. Takeshi Koga
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  5. Tadataka Morishita
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Hase, T., Kita, R., Kawaguchi, K. et al. Synthesis of single phase YBa2Cu3O7−x thin films from a Y-Ba-Cu metallic precursor by a low-temperature annealing. Journal of Materials Research 9, 1337–1342 (1994). https://doi.org/10.1557/JMR.1994.1337

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  • DOI: https://doi.org/10.1557/JMR.1994.1337

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