Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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MOD-TFA공정에 의한 YBCO박막 제조 시 cerium첨가효과에 관한 연구

Effect of Cerium Doping on Superconducting Properties of YBCO Film Prepared by TFA-MOD Method

  • Yi, Keum-Young (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Kwon, Youn-Kyung (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Kim, Byeong-Joo (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Ahn, Ji-Hyun (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Lee, Jong-Beom (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Kim, Hye-Jin (FCB Development team, SAMSUNG ELECTRO-MECHANICS CO., LTD) ;
  • Lee, Hee-Gyoun (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Hong, Gye-Won (Department of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Yoo, Jai-Moo (Korea Institute of Machinery and Materials) ;
  • Ri, Hyung-Chul (Kyungpook National University)
  • 발행 : 2006.10.31
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초록

The effects of Ba and Ce addition has been investigated in YBCO prepared by trifluoroacetate(TFA) metalorganic depostition(MOD) method. Precursor solutions with cation ratios of Y:Ba:Cu:Ce=1:2+x:3:x(x=0, 0.05, 0.1 and 1.5) have been prepared by adding an excess amount of cerium and barium. Coated film was calcined at lower temperature under a moisture-containing oxygen atmosphere. Superconducting YBCO films have been obtained by performing conversion heat treatment at temperature of $780{\sim}810^{\circ}C$ under a moisture-containing Ar(1,000 ppm oxygen) atmosphere. It has been shown that the critical current($I_c$) of YBCO film was degraded by doping of Ba and Ce atoms. But $I_c$ was increased as the amount of doped Ba and Ce content increased from 5% to 15 %. It was observed that there was little increase of a flux pinning force with Ba and Ce addition in YBCO film prepared by TFA-MOD process.

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