High-Pressure Synthesis of CuBa2Ca3Cu4O10+\delta Superconductor from Precursors Prepared by a Polymerized Complex Method
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概要
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Samples of a CuBa2Ca3Cu4O10+\delta superconductor were synthesized under a high pressure of 5 GPa at 1100--1200 °C for 30 min using precursors produced by solid-state reaction and polymerized complex methods. Compared with the precursors prepared by the solid-state reaction method, the precursors produced by the polymerized complex method have low grain sizes. The superconductive transition temperature of the samples prepared using precursors made by the polymerized complex method was found to be 113 K. The volume fractions of the superconducting phase in the samples prepared using precursors made by the solid-state reaction and polymerized complex methods were 49 and 36%, respectively. From these results, precursors made by the polymerized complex method can be used in the high-pressure synthesis of superconductors similarly to those made by the solid-state reaction method.
- 2011-01-25
著者
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Niihara Koichi
Extreme Energy-density Res. Inst. Nagaoka Univ. Of Technol.
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Suzuki Tsuneo
Extreme Energy-density Res. Inst. Nagaoka Univ. Of Technol.
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Nakayama Tadachika
Extreme Energy-density Research Institute Nagaoka University Of Technology
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Katsumata Tetsuhiro
Department Of Chemistry Faculty Of Science Gakushuin University
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Suematsu Hisayuki
Extreme Energy-density Res. Inst. Nagaoka Univ. Of Technol.
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Inaguma Yoshiyuki
Department Of Chemistry Faculty Of Science Gakushuin University
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Inaguma Yoshiyuki
Department of Chemistry, Gakushuin University, Toshima, Tokyo 171-8588, Japan
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Aoba Tomoya
Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Bizen Takeshi
Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Katsumata Tetsuhiro
Department of Chemistry, Tokai University, Hiratsuka, Kangawa 259-1292 Japan
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