Superconducting Volume Fraction in Overdoped Regime of La_<2-x>Sr_xCuO_4 : Implication for Phase Separation from Magnetic-Susceptibility Measurement(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We have grown a single crystal of La_<2-x>Sr_xCuO_4 in which the Sr concentration, x, continuously changes from 0.24 to 0.29 in the overdoped regime and obtained many pieces of single crystals with different x values by slicing the single crystal. From detailed measurements of the magnetic susceptibility, χ, of each piece, it has been found that the absolute value of χ at the measured lowest temperature 2K, |χ_<2K>|, on field cooling rapidly decreases with increasing x as well as the superconducting (SC) transition temperature. As the value of |χ_<2K>| is regarded as corresponding to the SC volume fraction in a sample, it has been concluded that a phase separation into SC and normalstate regions occurs in a sample of La_<2-x>Sr_xCuO_4 in the overdoped regime.
- 社団法人日本物理学会の論文
- 2005-11-15
著者
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KOIKE Yoji
Department of Applied Physics, Graduate School of Engineering, Tohoku University
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ADACHI Tadashi
Department of Applied Physics, Tohoku University
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NOJI Takashi
Department of Applied Physics, Tohoku University
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TANABE Yoichi
Department of Applied Physics, Graduate School of Engineering, Tohoku University
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Koike Yoji
Department Applied Physics Graduate School Of Engineering Tohoku University
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Noji Takashi
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Tanabe Yoichi
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Adachi T
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Adachi T
Faculty Of Environmental Sciences And Technology Okayama University
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Adachi Tadashi
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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NOJI Takashi
Department of Applied Physics, Graduate School of Engineering, Tohoku University
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