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Synthesis of Y–Ba–Cu–O films with ethylene diamine tetra-acetic acid complexes assisted by excimer laser ablation

Published online by Cambridge University Press:  31 January 2011

Norio Tanaka
Affiliation:
Department of Chemistry, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188 Japan
Hirotaka Wakabayashi
Affiliation:
Department of Chemistry, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188 Japan
Shin-ichi Mochizuki
Affiliation:
Department of Chemistry, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188 Japan
Shigeo Ohshio
Affiliation:
Department of Chemistry, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188 Japan
Hidetoshi Saitoh
Affiliation:
Department of Chemistry, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188 Japan
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Abstract

Y–Ba–Cu–O films were prepared on yttria-stabilized zirconia polycrystalline substrate using KrF excimer laser irradiation with ethylene diamine tetra-acetic acid (EDTA) complexes as a target material. The results of the x-ray θ-2θ scan showed that the films grown above 750 °C were preferentially oriented with a c-axis normal to the substrate. The value of full-width at half-maximum of (005) reflection reduced from 4.4° to 2.1° by increasing the laser power density in a range between 0.8 and 3.8 J/cm2. The transcription of the compositional ratio was improved by approaching the target-substrate distance from 45 to 20 mm. The films obtained at 800 °C consisted of many islands showing well-developed spiral growth, suggesting that the droplets of metal-EDTA complexes do not form random oriented crystalline particles on the surface of the substrate.

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Articles
Copyright
Copyright © Materials Research Society 1998

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References

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