한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)

한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

Phase Intergrowth in the Syntheses of Bi-superconducting Thin Films

  • Chun, Min-Woo (Department of Electrical & Electronic Eng., Dongshin University) ;
  • An, In-Soon (Department of Electrical & Electronic Eng., Dongshin University) ;
  • Park, Yong-Pil (Department of Electrical & Electronic Eng., Dongshin University)
  • 발행 : 2002.07.01
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초록

Phase intergrowth some kinds of the Bi$_2$Sr$_2$Ca$\_$n-1/Cu$\_$n/O$\_$y/ phases is observed in the thin film fabrication at ultralow co-deposition with multi targets by means of ion beam sputtering. The molar fraction of the Bi2212 phase in the mixed crystal of the grown films is investigated as a function of the applied ozone pressure and the substrate temperature. The activation energy for the phase transformation from the Bi2201 to the Bi2212 is estimated in terms of the Avrami equation. This study reveals that the formation of a liquid phase contributes significantly to the construction of the Bi2212 phase in the thin films, differing from the bulk synthesis.

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