한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제37권8호
  • /
  • Pages.787-791
  • /
  • 2000
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Bi계 산화물 초전도체 2212상에 있어서 Bi 자리에 Ge 치환에 따른 초전도 특성

Superconducting Properties of Ge Substitution for the Bi Site in the 2212 Phase of Bi-Sr-Ca-Cu-O Superconductors

  • 신재수 (대전대학교 이과대학 전자물리학과) ;
  • 이민수 (대전산업대학 정보통신컴퓨터공학부) ;
  • 최봉수 (대전산업대학 정보통신컴퓨터공학부) ;
  • 송승용 (한남대학교 이과대학 광·전자물리학과) ;
  • 송기영 (한남대학교 이과대학 광·전자물리학과)
  • 발행 : 2000.08.01
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초록

Samples with the nominal composition, Bi2-xGexSr2CaCu2O8＋$\delta$ (x=0, 0.1, 0.2, 0.3, 0.4, 0.5) were prepared by the solid-state reaction method. We have studied the effect of substitution Ge for Bi and investigated the superconducting properties by changing oxygen content with Ge substitution. It was found that temperature difference, ΔK, between TCon and TCzero was considerably smaller in the samples prepared by the intermediate pressing method than that in the samples by the solid-state reaction method. We found the solubility limit of Ge to the 80 K single phase was around x=0.3. Within the solubility limit, lattice constant c decreased with the increase of x. In the region of the 80K single phase, the onset critical temperature TCon increased and excess oxygen content decreased with increase of x.

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참고문헌

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