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arXiv · 1311.6213

Enhancement of Critical Current Densities in (Ba,K)Fe2As2 by 320 MeV Au Irradiation in Single Crystals and by High-Pressure Sintering in PIT Wires

Sunseng Pyon·Toshihiro Taen·Fumiaki Ohtake·Yuji Tsuchiya·Hiroshi Inoue·Hiroki Akiyama·Hideki Kajitani·Norikiyo Koizumi·Satoru Okayasu·Tsuyoshi Tamegai
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Abstract

We demonstrate a large enhancement of critical current density (Jc) up to 1.0x10^7 A/cm2 at 5 K under self-field in (Ba,K)Fe2As2 single crystals by irradiating 320 MeV Au ions. With the very promising potential of this material in mind, we have fabricated a (Ba,K)Fe2As2 superconducting wire through a powder-in-tube method combined with the hot isostatic pressing technique, whose effectiveness has been proven in industrial Bi2223 tapes. The Jc in the wire at 4.2 K has reached 37 kA/cm2 under self-field and 3.0 kA/cm2 at 90 kOe. Magneto-optical imaging of the wire confirmed the large intergranular Jc in the wire core.

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Sunseng Pyon, Toshihiro Taen, Fumiaki Ohtake, Yuji Tsuchiya, Hiroshi Inoue, Hiroki Akiyama, Hideki Kajitani, Norikiyo Koizumi, Satoru Okayasu, Tsuyoshi Tamegai. 2013-11-25. Enhancement of Critical Current Densities in (Ba,K)Fe2As2 by 320 MeV Au Irradiation in Single Crystals and by High-Pressure Sintering in PIT Wires. https://doi.org/10.7567/apex.6.123101

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