Growth of YBa2(Cu,Co)4O8 Single Crystals Under Ambient Pressure and Their Superconducting Properties
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概要
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We report the growth of superconducting YBa2(Cu,Co)4O8 single crystals using KOH flux under ambient pressure and their superconducting properties. The average size of the YBa2(Cu,Co)4O8 single crystals is $0.3 \times 0.3 \times 0.2$ mm3. The superconducting transition temperature ($T_{\text{c}}$) of the parent material is found to be 81 K, indicating a stoichiometric oxide superconductor. The $T_{\text{c}}$ and the $c$-axis length of YBa2(Cu,Co)4O8 single crystals decrease systematically with increasing the Co-doping content. A comparison of the magnetic irreversibility with the flux-creep theory from the viewpoint of homogeneity/inhomogeneity is made.
- 2010-01-15
著者
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Takami Tsuyoshi
Department Of Crystalline Materials Science Nagoya University
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Itoh Masayuki
Department Of Applied Chemistry Kanagawa Institute Of Technology
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Shimokata Ayako
Department Of Physics Graduate School Of Science Nagoya University
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Itoh Masayuki
Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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Takami Tsuyoshi
Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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Shimokata Ayako
Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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