Oxygen content and disorder effects on the critical current density in YBa2Cu3Ox

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12 Scopus citations

Abstract

Magnetic measurements have been used to evaluate the critical current density Jc for YBa2Cu3Ox samples with various oxygen content (x) and, for partially oxygenated samples (x to approximately 6.5), with different degrees of oxygen disorder. The current density has been expressed in terms (T/Tc), where δ decreases linearly with x for x<6.6 and becomes constant for 6.6<x<7. Moreover, the variation in Tc with oxygen content has been used to represent Jc as Jc = Jo (x/Tc)-n, where Jo is almost constant and n is temperature dependent. At a given temperature ratio (T/Tc), the oxygen disorder enhances the critical current density and weakens its field dependence. It is argued that the increased number of Cu(1)+30 clusters with increasing disorder may cause additional pinning centres and affect the Jc behaviour.

Original languageEnglish
Pages (from-to)30-33
Number of pages4
JournalSuperconductor Science and Technology
Volume14
Issue number1
DOIs
StatePublished - Jan 2001

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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