Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Synthesis and pressure effects on the La doped CaFe2As2

  • Shin, Soohyeon (Department of physics, Sungkyunkwan University) ;
  • Shang, T. (Department of physics, Zhejiang University) ;
  • Yuan, H.Q. (Department of physics, Zhejiang University) ;
  • Park, Tuson (Department of physics, Sungkyunkwan University)
  • Received : 2014.03.20
  • Accepted : 2014.09.24
  • Published : 2014.09.30
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Abstract

We have synthesized La doped $CaFe_2As_2$ single crystals with Sn flux in an evacuated quartz ampule. Doping and pressure effects on the magnetic and superconducting properties of the under-doped $Ca_{1-x}La_xFe_2As_2$ (x=0.08, 0.1) were studied by measuring electrical resistivity under quasi-hydrostatic pressure up to 21 kbar. Magnetic transition temperatures for all studied concentrations were sharply suppressed with slight amplitude of pressure, less than 3 kbar, while superconducting transition temperatures were robust against pressure. In this communication, we report temperature-pressure phase diagram for the La-doped $CaFe_2As_2$ single crystals.

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References

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