Microstructure and flux pinning of OCMG processed (Sm0.33Eu 0.33Gd0.33)Ba2Cu3Oy with sub-micron Gd2BaCuO5 second phase particles

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Abstract

We present study of microstructure and magnetic properties of bulk melt-textured (Sm0.33Eu0.33Gd0.33)Ba 2Cu3Oy "SEG-123" superconductors with 30 mol% of fine Gd-211 particles. To improve flux pinning performance at 77 K, Gd-211 particles of various sizes were added to the SEG-123 matrix before melt-texture growth. Scanning electron microscopy showed that the homogeneity of 211 particle dispersion improved with increasing sub-micron size of initially added 211 powder. At the same time, the self-field critical current density, Jc improved and reached 107 kA/cm2 at 77 K (Ha∥c-axis). The size of Gd-211 particles did not affect pinning force density in high fields.

Original languageEnglish
Pages (from-to)619-622
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume392-396
Issue numberPART 1
DOIs
Publication statusPublished - 2003 Oct 1
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13

Keywords

  • Flux-pinning for material index
  • LRE-BaCuO
  • Melt-textured
  • SEG-123
  • Ultra-fine Gd-211

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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