Optimization of the Dy Content in Single Crystalline GdBCO Bulk Superconductors Fabricated in Air Via Top-Seeded Infiltration Growth Process

  • S. Pavan Kumar Naik
  • M. MuralidharEmail author
  • M. Murakami
Original Paper


Single-crystalline bulk GdBa2Cu3O7−δ (GdBCO) superconductors were fabricated with top-seeded infiltration-growth technique (TSIG) in air by adding the different amounts of Dy2BaCuO5 (Dy-211) particles (5, 10, 15, 20, 25, 30, 35, and 40 wt%). All the samples show superconducting critical temperature at ∼93 K with sharp transition irrespective of the chemical composition. X-ray diffraction measurements confirmed that all the samples were single domain with high alignment. Microstructural studies through scanning electron microscopy showed that TSIG-processed GdBCO samples contained 211 phase particles of two different sizes, i.e., ∼2–4 and ∼10 μ m. The addition of Dy-211 phase particles led to a significant enhancement of critical current density (J c) at 77 K. GdBCO superconductor with the addition of 20 wt% of Dy-211 showed the highest J c of 45.5 kA/cm 2 at 77 K and self field.


IG process (Gd, Dy)BCO Microstructure Critical current density 



SPKN would like to acknowledge Shibaura Institute of Technology, Tokyo, Japan, gratefully for providing fellowship.


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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • S. Pavan Kumar Naik
    • 1
  • M. Muralidhar
    • 1
    Email author
  • M. Murakami
    • 1
  1. 1.Superconducting Materials Laboratory, Graduate School of Science and EngineeringShibaura Institute of TechnologyTokyoJapan

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