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首页> 外文期刊>Japanese journal of applied physics >Transition temperatures and irreversibility-field properties of (Cu_(1-x)C_x)Sr_2CaCu_2O_(7-δ) superconductors with precisely controlled oxygen contents
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Transition temperatures and irreversibility-field properties of (Cu_(1-x)C_x)Sr_2CaCu_2O_(7-δ) superconductors with precisely controlled oxygen contents

机译：含氧量精确控制的（Cu_（1-x）C_x）Sr_2CaCu_2O_（7-δ）超导体的转变温度和不可逆场性质

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摘要

(Cu_(1-x)C_x)Sr_2CaCu_2O_(7-δ) samples with precisely controlled oxygen contents (δ ＝ 0.10-0.35) were successfully synthesized under a pressure of 5.5 GPa and followed by annealing in He gas at various temperatures. The oxygen content of an as-synthesized sample was determined by iodometric titration, and the changes of the oxygen content were estimated by measuring weight-loss during the post-annealing. Superconducting transition temperatures (T_c) decreased from 93.1 to 83.1 K with decreasing the oxygen content from 6.90 to 6.65. Hole-doping level was tuned to be underdoped so that the slope of the irreversibility field (H_(irr)) increased.
机译：在5.5 GPa的压力下成功合成了含氧量精确控制（δ＝ 0.10-0.35）的（Cu_（1-x）C_x）Sr_2CaCu_2O_（7-δ）样品，然后在不同温度的氦气中退火。通过碘量滴定法测定合成样品中的氧含量，并通过测量后退火过程中的失重来估算氧含量的变化。超导转变温度（T_c）从93.1降低到83.1 K，氧含量从6.90降低到6.65。将空穴掺杂水平调整为掺杂不足，从而增加不可逆场的斜率（H_（irr））。

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  • 来源
    《Japanese journal of applied physics》 |2014年第2s期|02BC09.1-02BC09.4|共4页
  • 作者

    Shunki Shibaoka; Tomoya Aoba; Tsuneo Suzuki; Tadachika Nakayama; Hisayuki Suematsu; Koichi Niihara;

  • 作者单位

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka, Niigata 940-2188, Japan;

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