Diamagnetism above $T_{\text{c}}$ in Underdoped Bi2.2Sr1.8Ca2Cu3O10+δ
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概要
- 論文の詳細を見る
Single crystals of Bi2+xSr2-xCa2Cu3O10+δ (Bi2223) with $x=0.2$ were grown by a traveling solvent floating zone method in order to investigate the superconducting properties of highly underdoped Bi2223. Grown crystals were characterized by X-ray diffraction, DC susceptibility and resistivity measurements, confirming Bi2223 to be the main phase. The crystals were annealed under various oxygen partial pressures to adjust their carrier densities from optimally doped to highly underdoped. The fluctuation diamagnetic component above the superconducting transition temperature $T_{\text{c}}$ extracted from the anisotropic normal state susceptibilities $\chi_{ab}(T)$ ($H\perp c$) and $\chi_{c}(T)$ ($H\parallel c$) was found to increase with underdoping, suggesting a decrease in the superconducting dimensionality and/or increase in the fluctuating vortex liquid region.
- Physical Society of Japanの論文
- 2010-11-15
著者
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Ikeda Ryusuke
Department Of Physics Kyoto University
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Matsuda Azusa
Department Of Cell Biology National Institute For Basic Biology
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Iye Tetsuya
Department of Physics, School of Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Matsuda Azusa
Department of Physics, School of Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Nagatochi Takenori
Department of Physics, School of Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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