Enhanced Superconducting Properties of Air-Processed GdBa 2Cu 3O 7-δ Single Domains with BaCO 3/BaCuO 2-x Addition

Caixuan Xu, Anming Hu, Naomichi Sakai, Izumi Hirabayashi, Mitsuru Izumi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Single domain GdBa 2Cu 7-δ (Gd123) bulk superconductors were fabricated in air by top-seeding melt-texture growth. Performance of the air-processed Gd123 was successfully enhanced by addition of both BaCO 3 and BaCuO 2-x , which suppress the formation of Gd 1+x Ba 2-x Cu 3O 7-δ solid solutions. The optimum doping amount ranges from 0.05 to 0.15, M BaCO 3 and 0.05 to 0.1, M BaCuO 2-x per molar Gd123. The distribution of the second phase particles was observed by scanning electron microscopy. A narrow band formed by Gd 2BaCuO 5 particle concentration appeared around the seeding zone in both a-b plane and c-growth sector in Gd123 single grain. Trapped magnetic field density reached 0.67, T for sample with 24 mm in diameter and 8, mm in thickness and a high critical current density J c up to 91,200, A/cm 2 was achieved at 77, K under self-field.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Issue number4
Publication statusPublished - 2007 May
Externally publishedYes


  • Air processing
  • BaCO /BaCuO
  • Critical current density J .
  • Gd Ba Cu O solid solutions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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