Preparation and characterization of the Ga doped Bi-Sr-Ca-Cu-O system

L. Dimesso, I. Matsubara, T. Ogura, R. Funahashi, H. Yamashita, Anna Tampieri

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10 Scopus citations

Abstract

The preparation and the characterization of the 2212 phase in the Bi2Sr1.7CaGaxCu2-xOy system prepared by a solid- state reaction is reported. The dependence of the thermal, structural and superconducting properties on the Ga content is discussed. XRD data and SEM-EDX observations revealed the presence of Bi-Sr-Ca-Ga complex oxides in the Ga richer compounds. The electrical and magnetic measurements showed a single step as well as a broadening of the transitions width at an increase of the Ga content. The higher critical current density value (3.8×106 A cm-2 at 5 K for H = 2 KOe and 5.3 × 106 A cm-2 at 5 K H = 2 KOe for x = 0 and x = 0.8, respectively) found in the Ga doped sample has been explained as a direct consequence of a stronger pinning due to the presence of the Ga containing complex oxides.

Original languageEnglish (US)
Pages (from-to)291-299
Number of pages9
JournalPhysica C: Superconductivity and its Applications
Volume227
Issue number3-4
DOIs
StatePublished - Jul 1 1994

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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