Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
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High-Pressure Synthesis of $SmFeAsO_{1-x}F_x$(x=0.2) Single Crystals

$SmFeAsO_{1-x}F_x$(x=0.2)의 고압 단결정 합성

  • Lee, Hyun-Sook (Department of Physics, Pohang University of Science and Technology) ;
  • Park, Jae-Hyun (Department of Physics, Pohang University of Science and Technology) ;
  • Lee, Jae-Yeap (Department of Physics, Pohang University of Science and Technology) ;
  • Kim, Ju-Young (Materials Science and Engineering, Gwangju Institute of Science and Technology) ;
  • Cho, B.K. (Materials Science and Engineering, Gwangju Institute of Science and Technology) ;
  • Jung, Chang-Uk (Department of Physics, Hankuk University of Foreign Studies) ;
  • Lee, Hu-Jong (Department of Physics, Pohang University of Science and Technology)
  • Published : 2009.04.30
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Abstract

Fluorine-doped $SmFeAsO_{1-x}F_x$ single crystals with the nominal value of x=0.2 were grown at $1350-1450^{\circ}C$ under the pressure of 3.3 GPa by using the self-flux method. Plate-shaped single crystals in the range of a few-150 ${\mu}m$ in their lateral size were obtained. The detailed crystal structure was analyzed by using the x-ray diffractometry. Superconducting transition temperature, determined by the resistive transition, of a single crystal was about 49 K with a narrow resistive transition width of ${\sim}1$ K. A relatively sharp transition, a low residual resistivity, and a large residual resistivity ratio compared with those reported for $REFeAsO_{1-x}F_x$(RE=Sm, Nd) single crystals indicate the high quality of our single crystals.

Keywords

References

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