Enhancement of critical current densities in (Ba,K)Fe2As2 wires and tapes using HIP technique

Sunseng Pyon, Takahiro Suwa, Akiyoshi Park, Hideki Kajitani, Norikiyo Koizumi, Yuji Tsuchiya, Satoshi Awaji, Kazuo Watanabe, Tsuyoshi Tamegai

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


(Ba,K)Fe2As2 superconducting wires and tapes are fabricated by using hot isostatic pressing (HIP) technique, and their superconducting properties are studied. In the HIP round wire, transport critical current density (J c) at 4.2 K has achieved record-high value of 175 kA cm-2 at zero field, and exceeds 20 kA cm-2 even at 100 kOe. Improvement of polycrystalline powder synthesis may play a key role for the enhancement of J c. In the HIP tape, even larger transport J c of 380 kA cm-2 is realized at zero field. Based on magnetization and magneto-optical measurements, possible further enhancement of J c is discussed.

Original languageEnglish
Article number115002
JournalSuperconductor Science and Technology
Issue number11
Publication statusPublished - 2016 Sept 26


  • (Ba,K)FeAs
  • Superconducting wires and tapes
  • critical current density
  • hot isostatic pressing (HIP)
  • powder-intube (PIT)


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