Large Transport Critical Current Densities of Ag Sheathed (Ba,K)Fe2As2+Ag Superconducting Wires Fabricated by an Ex-situ Powder-in-Tube Process
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概要
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We report large transport critical current densities observed in Ag-added (Ba,K)Fe2As2 superconducting wires prepared by an ex-situ powder-in-tube (PIT) process. The wire has a simple composite structure sheathed only by Ag. A precursor bulk material prepared by a melting process was ground into powder and put into a Ag tube. The composite was then cold worked into a wire and heat treated at 850 °C for sintering. Transport critical current densities, $J_{\text{c}}$, at 4.2 K are $1.0\times 10^{4}$ A/cm2 ($I_{\text{c}} = 60.7$ A) in self field and $1.1\times 10^{3}$ A/cm2 ($I_{\text{c}} = 6.6$ A) in 10 T. These are the highest values reported so far for the Fe-based superconducting wires.
- 2011-04-25
著者
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TOGANO Kazumasa
National Institute for Materials Science
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KUMAKURA Hiroaki
National Research Institute for Metals, Sengen
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Matsumoto Akiyoshi
National Institute For Materials Science
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Kumakura H
National Research Institute For Metals:crest Japan Science And Technology Corporation
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Kumakura Hiroaki
National Inst. For Materials Sci. Ibaraki Jpn
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Matsumoto Akiyoshi
National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
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