Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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카본블랙이 도핑 된 $MgB_2$ 초전도체의 Ag 첨가의 영향

Influence of Ag Addition on Superconducting Property of Carbon-black Doped $MgB_2$ Superconductor

  • Kim, H.J. (Materials Engineering Department, Korea University of Technology and Education) ;
  • Kim, H.J. (Materials Engineering Department, Korea University of Technology and Education) ;
  • Kim, C.J. (Nuclear Science Division, Korea Atomic Energy Research Institute) ;
  • Park, H.W. (Materials Engineering Department, Korea University of Technology and Education)
  • 투고 : 2010.08.03
  • 심사 : 2010.10.04
  • 발행 : 2010.10.31
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초록

In this work we synthesized both MgB2 and Carbon doped MgB2 superconductor with Ag addition via high energy milling and substituent heat treatment. Heat treatments were performed at $900\;^{\circ}C$ for 30 min in flowing Ar gas. We varied amount of Ag powder. In a range of Ag powder was 0~5wt%. The effect of Ag was correlated with superconducting properties. The results show a slight decrease in critical temperature ($T_c$) and a reduction of critical current density ($J_c$) at high fields for the Ag-doped samples as compared to the un-doped samples. Reduction of $J_c$ may be due to the formation of MgAg compound.

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참고문헌

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