Thermal and x-ray analyses of high temperature superconductor YBa2Cu3O6.74

Masae Kikuchi; Yasuhiko Syono; Ayako Tokiwa; Katsuyoshi Oh-Ishi; Hide Arai; Kenji Hiraga; Norio Kobayashi; Takaaki Sasaoka

doi:10.1143/JJAP.26.L1066

Thermal and x-ray analyses of high temperature superconductor YBa2Cu3O6.74

Masae Kikuchi, Yasuhiko Syono, Ayako Tokiwa, Katsuyoshi Oh-Ishi, Hide Arai, Kenji Hiraga, Norio Kobayashi, Takaaki Sasaoka

Global course of Engineering and Science

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Abstract

In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) Å, b=3.8888(7) Å, and c=11.668(2) Å.

Original language	English
Pages (from-to)	1066-1099
Number of pages	34
Journal	Japanese Journal of Applied Physics
Volume	26
Issue number	6A
DOIs	https://doi.org/10.1143/JJAP.26.L1066
Publication status	Published - 1987 Jun

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ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Cite this

Kikuchi, M., Syono, Y., Tokiwa, A., Oh-Ishi, K., Arai, H., Hiraga, K., Kobayashi, N., & Sasaoka, T. (1987). Thermal and x-ray analyses of high temperature superconductor YBa2Cu3O6.74. Japanese Journal of Applied Physics, 26(6A), 1066-1099. https://doi.org/10.1143/JJAP.26.L1066

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title = "Thermal and x-ray analyses of high temperature superconductor YBa2Cu3O6.74",

abstract = "In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) {\AA}, b=3.8888(7) {\AA}, and c=11.668(2) {\AA}.",

author = "Masae Kikuchi and Yasuhiko Syono and Ayako Tokiwa and Katsuyoshi Oh-Ishi and Hide Arai and Kenji Hiraga and Norio Kobayashi and Takaaki Sasaoka",

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AU - Kikuchi, Masae

AU - Syono, Yasuhiko

AU - Tokiwa, Ayako

AU - Oh-Ishi, Katsuyoshi

AU - Arai, Hide

AU - Hiraga, Kenji

AU - Kobayashi, Norio

AU - Sasaoka, Takaaki

PY - 1987/6

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N2 - In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) Å, b=3.8888(7) Å, and c=11.668(2) Å.

AB - In situ observation of oxygen absorption and desorption during heating and cooling cycle with TG and DTA was done to determine the optimum preparation conditions of high Tc Y-Ba-Cu-O compounds. We suggest the best recipe in air is to fire the raw mixture of 1/2Y2O3, 2BaCO3 and 3CuO at 930°C for more than 10 h, followed by slow cooling in the furnace to take as much oxygen as possible within the specimen. With this method single phase material of an orthorhombic superconducting oxide YBa2Cu3O6.74 with Tc=91.3 K was synthesized, with orthorhombic unit cell dimensions of a=3.8180(6) Å, b=3.8888(7) Å, and c=11.668(2) Å.

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10.1143/JJAP.26.L1066