Preparation of YBCO Superconducting Nano-Composite Films by MOCVD

Hisanori Yamane; Hideyuki Kurosawa; Toshio Hirai

doi:10.2497/jjspm.41.370

Preparation of YBCO Superconducting Nano-Composite Films by MOCVD

Hisanori Yamane, Hideyuki Kurosawa, Toshio Hirai

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Y-Ba-Cu-0 (YBCO) superconducting films were prepared on SrTiO₃(100) substrates by metalorganic chemical vapor deposition. The precursors used were β-diketone chelates of Y, Ba and Cu. The YBCO films, having superconducting transition temperature defined by zero resistivity (T_c(R=0)) above 90 K and critical current density (J_c) over 10⁶ A/cm² at 77 K and 0 T, were obtained at the conditions of oxygen partial pressure (Poj) and deposition temperature (T^dep) near the CuO-Cu₂O-O₂equilibrium line (PO₂=3.6 Torr-T_dep= 850°0 and PO₂=0.036 Torr - T_dep=700-720°C). The films prepared at these conditions showed J_c over 10⁴ A/cm² at 77 K in high magnetic fields above 20 T. The nano-composite structure of the YBCO films was studied by transmission electron microscopy. CuO and Y₂Cu₂0₅ grains with a size of 0.1-2 µm were included. The precipitates of about 10 nm in size were observed in the matrix of the YBCO films.

Original language	English
Pages (from-to)	370-376
Number of pages	7
Journal	journal of the japan society of powder and powder metallurgy
Volume	41
Issue number	4
DOIs	https://doi.org/10.2497/jjspm.41.370
Publication status	Published - 1994 Feb 1

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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title = "Preparation of YBCO Superconducting Nano-Composite Films by MOCVD",

abstract = "Y-Ba-Cu-0 (YBCO) superconducting films were prepared on SrTiO3(100) substrates by metalorganic chemical vapor deposition. The precursors used were β-diketone chelates of Y, Ba and Cu. The YBCO films, having superconducting transition temperature defined by zero resistivity (Tc(R=0)) above 90 K and critical current density (Jc) over 106 A/cm2 at 77 K and 0 T, were obtained at the conditions of oxygen partial pressure (Poj) and deposition temperature (Tdep) near the CuO-Cu2O-O2equilibrium line (PO2=3.6 Torr-Tdep= 850°0 and PO2=0.036 Torr - Tdep=700-720°C). The films prepared at these conditions showed Jc over 104 A/cm2 at 77 K in high magnetic fields above 20 T. The nano-composite structure of the YBCO films was studied by transmission electron microscopy. CuO and Y2Cu205 grains with a size of 0.1-2 µm were included. The precipitates of about 10 nm in size were observed in the matrix of the YBCO films.",

author = "Hisanori Yamane and Hideyuki Kurosawa and Toshio Hirai",

year = "1994",

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doi = "10.2497/jjspm.41.370",

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AU - Yamane, Hisanori

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AU - Hirai, Toshio

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Y1 - 1994/2/1

N2 - Y-Ba-Cu-0 (YBCO) superconducting films were prepared on SrTiO3(100) substrates by metalorganic chemical vapor deposition. The precursors used were β-diketone chelates of Y, Ba and Cu. The YBCO films, having superconducting transition temperature defined by zero resistivity (Tc(R=0)) above 90 K and critical current density (Jc) over 106 A/cm2 at 77 K and 0 T, were obtained at the conditions of oxygen partial pressure (Poj) and deposition temperature (Tdep) near the CuO-Cu2O-O2equilibrium line (PO2=3.6 Torr-Tdep= 850°0 and PO2=0.036 Torr - Tdep=700-720°C). The films prepared at these conditions showed Jc over 104 A/cm2 at 77 K in high magnetic fields above 20 T. The nano-composite structure of the YBCO films was studied by transmission electron microscopy. CuO and Y2Cu205 grains with a size of 0.1-2 µm were included. The precipitates of about 10 nm in size were observed in the matrix of the YBCO films.

AB - Y-Ba-Cu-0 (YBCO) superconducting films were prepared on SrTiO3(100) substrates by metalorganic chemical vapor deposition. The precursors used were β-diketone chelates of Y, Ba and Cu. The YBCO films, having superconducting transition temperature defined by zero resistivity (Tc(R=0)) above 90 K and critical current density (Jc) over 106 A/cm2 at 77 K and 0 T, were obtained at the conditions of oxygen partial pressure (Poj) and deposition temperature (Tdep) near the CuO-Cu2O-O2equilibrium line (PO2=3.6 Torr-Tdep= 850°0 and PO2=0.036 Torr - Tdep=700-720°C). The films prepared at these conditions showed Jc over 104 A/cm2 at 77 K in high magnetic fields above 20 T. The nano-composite structure of the YBCO films was studied by transmission electron microscopy. CuO and Y2Cu205 grains with a size of 0.1-2 µm were included. The precipitates of about 10 nm in size were observed in the matrix of the YBCO films.

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