Growth and very anisotropic upper critical field of single-crystal bi2sr2cacu2oy

Yoji Koike, Takashi Nakanomyo, Tetsuo Fukase

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Abstract

Flaky single crystals of a new high-Tcoxide Bi2Sr2CaCu2Oywith dimensions of the order of 1×1×0.1 mm3have been prepared using a CuO flux method. The electrical resistivity shows a sharp superconducting transition at 80.6 K. The upper critical field Hc2was determined to be very anisotropic. The values of -dHc2dT for H//c-axis and H⊥c-axis are 0.39 T/K and 7.3 T/K, respectively. The ratio of -dHc2dT to -dHc2dT is 19. The value of Hc2(0) for H⊥c-axis is estimated to be as large as 400 T. The Ginzburg-Landau coherence length along the c-axis at 0 K ξ (0) is 2.1 Å, suggesting quasi-two-dimensional superconductivity.

Original languageEnglish
Pages (from-to)L841-L843
JournalJapanese journal of applied physics
Volume27
Issue number5A
DOIs
Publication statusPublished - 1988 May

Keywords

  • Anisotropic properties
  • Bi-Sr-Ca-Cu-O
  • Bi2Sr2CaCu2Oy
  • Crystal growth
  • Electrical resistivity
  • High-Tc oxide superconductor
  • Quasi-two-dimensional superconductivity
  • Single crystal
  • Superconducting transition temperature
  • Upper critical field

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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