Effect of Magnetic Field on the Superconducting Phase in the Electron-Doped Metallic Double-Chain Compound Pr
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概要
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We report the magnetotransport and dc magnetic susceptibility of the polycrystalline samples of Pr<inf>2</inf>Ba<inf>4</inf>Cu<inf>7</inf>O<inf>15-\delta</inf>, to examine the effect of magnetic field on the superconducting phase of the metallic CuO double-chain. The resistive critical magnetic field is estimated to be about 21 T at low temperatures from the resistive transition data. On the other hand, the corresponding critical field determined from the magnetization measurements gives rise to a very low value of {\sim}0.3 T at 2 K. These discrepancies in the magnetic response between the resistivity and magnetization data are caused by disappearance of the magnetically shielding effect even in relatively lower fields. In spite of the observation of the resistive drop associated with the superconducting transport currents, the suppression of the diamagnetic signal is probably related to the superconductivity of quasi one-dimensional CuO double-chain. The behavior of Seebeck coefficient in the superconducting Pr<inf>2</inf>Ba<inf>4</inf>Cu<inf>7</inf>O<inf>15-\delta</inf>is discussed on the basis of the double chain model from the density functional band calculation.
- 2013-07-15
著者
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Ono Yoshiaki
Department Of Geriatric Dentistry Osaka Dental University
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Matsukawa Michiaki
Department Of Energy Engineering Faculty Of Engineering Yokohama National University
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Sano Kazuhiro
Department Of Physics Engineering Mie University
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Echigoya Jun-ichi
Department Of Materials And Technology Faculty Of Engineering Iwate University
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Kobayashi Satoru
Department Biology Tokyo Metropolitan Institute Of Gerontology
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Sasaki Takahiko
Institute for Materials Reseach, Tohoku University, 2-1-1 Katahira-cho, Aoba-ku, Sendai 980-8577, Japan
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Sano Kazuhiro
Department of Physics Engineering, Mie University, Tsu 514-8507, Japan
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Chiba Taiji
Department of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan
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Tada Junki
Department of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan
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Hagiwara Makoto
Kyoto Institute of Technology, Kyoto 606-8585, Japan
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Miyazaki Tsuyoshi
Kyoto Institute of Technology, Kyoto 606-8585, Japan
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Kobayashi Satoru
Department of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan
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Matsukawa Michiaki
Department of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan
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