Mass production of low-cost GdBaCuO bulk superconductors using a novel seed in the batch process

M. Muralidhar, K. Suzuki, Y. Fukumoto, A. Ishihara, M. Tomita

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We developed a batch process with cold seeding, which considerably reduces the production cost. This batch process is appropriate for fabrication of various LREBa2Cu3Oy (where LRE represents a light rare earth element) compounds as it employs novel thin film Nd-123 seeds grown on MgO crystals, compatible with all LRE-123 materials. In the first stage we are able to fabricate GdBa2Cu3Oy compound with large single grain, enhanced pinning, and good quality at a dramatically reduced cost. Magnetization results conformed that the samples have a sharp superconducting transition (around 1 K wide) with the onset Tc around 93.5 K. The self-field Jc of 72 kA/cm2 was achieved at 77 K,H//c-axis in various positions of the pellet. The trapped field measurements showed that the samples were single-domain and of good pinning performance. The trapped field observed in the best 45 mm single-grain puck of Gd-123 was in the range of 1.35T and 0.35 T at 77.3 K and 87.3 K, respectively. The batch process technology for production of melt-processed LRE-123 provides a cost-effective method to fabricate high-performance superconducting super-magnets for various commercial applications.

Original languageEnglish
Article number5624602
Pages (from-to)2702-2705
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3 PART 3
Publication statusPublished - 2011 Jun
Externally publishedYes


  • Batch process
  • Flux pinning
  • Melt-processed bulk materials
  • Superconducting magnets at 77.3 K and 87.3 K

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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