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Pressure-temperature phase diagram of the EuRbFe_4As_4 superconductor

机译：EURBFE_4AS_4超导体的压力温度相图

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摘要

The pressure dependencies of the magnetic and superconducting transitions, as well as that of the superconducting upper critical field, are reported for single crystalline EuRbFe4As4. Resistance measurements were performed under hydrostatic pressures up to 6.21 GPa and in magnetic fields up to 9 T. Zero-field-cooled magnetization measurements were performed under hydrostatic pressures up to 1.24 GPa under 20 mT applied field. Superconducting transition temperature, T-c, up to 6.21 GPa and magnetic transition temperature, T-M, up to 1.24 GPa were obtained and a pressure-temperature phase diagram was constructed. Our results show that T-c is monotonically suppressed upon increasing pressure. T-M is linearly increased up to 1.24 GPa. For the studied pressure range, no signs of the crossing of T-M and T-c lines are observed. The normalized slope of the superconducting upper critical field is gradually suppressed with increasing pressure, which may be due to the continuous change of Fermi velocity v(F) with pressure.
机译：据报道，磁性和超导转变的压力依赖性以及超导上部临界场的压力依赖性用于单晶EURBFE4AS4。在静水压压力下进行抗性测量，在高达6.21GPa和高达9吨的磁场下进行。在静水压压力下进行零场冷的磁化测量，在20mT施加的场上的静水压力下进行。得到超导转变温度T-C，高达6.21GPa和磁性转变温度T-M，高达1.24GPa，构建压力 - 温度相图。我们的结果表明，在增加压力时，T-C单调抑制。 T-M是线性增加到1.24GPa。对于研究的压力范围，没有观察到T-M和T-C线路的交叉的迹象。随着压力的增加，超导上临界场的归一化斜率逐渐抑制，这可能是由于Fermi速度V（F）具有压力的连续变化。

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  • 来源
    《Physical review》 |2019年第14期|144509.1-144509.6|共6页
  • 作者

    Xiang Li; Budko Sergey L.; Bao Jin-Ke; Chung Duck Young; Kanatzidis Mercouri G.; Canfield Paul C.;

  • 作者单位

    Iowa State Univ Ames Lab Ames IA 50011 USA|Iowa State Univ Dept Phys & Astron Ames IA 50011 USA;

    Iowa State Univ Ames Lab Ames IA 50011 USA|Iowa State Univ Dept Phys & Astron Ames IA 50011 USA;

    Argonne Natl Lab Mat Sci Div 9700 S Cass Ave Argonne IL 60439 USA;

    Argonne Natl Lab Mat Sci Div 9700 S Cass Ave Argonne IL 60439 USA;

    Argonne Natl Lab Mat Sci Div 9700 S Cass Ave Argonne IL 60439 USA;

    Iowa State Univ Ames Lab Ames IA 50011 USA|Iowa State Univ Dept Phys & Astron Ames IA 50011 USA;

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