Enhancement in transport properties of seeded melt-textured YBCO by Cu-site doping

Yu X. Zhou, W. Lo, Tong B. Tang, Kamel Salama

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

A significant research effort has been made worldwide to introduce nanometre-scale weak superconducting regions into seeded melt-textured superconductors to enhance their critical current density, trapped magnetic field and levitation force. The enhancement in these properties is dependent on the pinning forces exerted on the magnetic flux lines. In this paper we present a substantial improvement in the transport properties of these materials by optimizing the fabrication conditions, controlling the oxygen deficiency, as well as adjusting the doping level of Zn in YBa2(Cu1-xZnx)3O7-δ large grains. The enhancement is found to be as much as 30% by doping between about x = 0.001 25 and 0.002 53. The results strongly indicate that the introduction of local nanometre-scale weak superconducting regions by Zn substitution for Cu in the CuO2 plane enhances the transport properties. Due to the simplicity of the processing conditions, these doping techniques can have a significant potential for a variety of engineering applications.

Original languageEnglish (US)
Pages (from-to)722-726
Number of pages5
JournalSuperconductor Science and Technology
Volume15
Issue number5
DOIs
StatePublished - May 1 2002

ASJC Scopus subject areas

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

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