AC susceptibility and microstructure of alkali doped polycrystalline YBCO HTSC materials

A. Veneva, D. K. Petrov, P. Dittrich, M. J. Naughton

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this work we report experimental results concerning the influence of potassium and excess copper additions on the AC complex susceptibility and microstructural development within polycrystalline YBCO high-temperature superconductors with nominal composition Y1-0.2xBa2-0.2xKxCu3Oy (x = 0-1.20). The real (X′) and the imaginary (X″) parts of the complex magnetic susceptibility of YBCO were recorded as a function of the temperature at various magnetic fields up to 10 Oe. From these data the intergranular critical current densities were calculated using Bean's critical state model. A proper concentration x, which is approximately equal to x = 0.40 in the initial Y1-0.2xBa2-0.2xKxCu3Oy batch was found to improve the Josephson coupling between the grains.

Original languageEnglish
Pages (from-to)230-234
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number3-4
Publication statusPublished - 1996 Nov 10
Externally publishedYes


  • AC susceptibility of superconductors
  • Critical current density
  • Grain boundaries
  • Microstructure
  • Substitution effects
  • Weak links

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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