Enhancement of Critical Current Densities in (Ba,K)Fe
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概要
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We demonstrate a large enhancement of critical current density (J_{\text{c}}) up to 1.0\times 10^{7} A/cm<sup>2</sup>at 5 K under self-field in (Ba,K)Fe<inf>2</inf>As<inf>2</inf>single crystals by irradiating 320 MeV Au ions. With the very promising potential of this material in mind, we have fabricated a (Ba,K)Fe<inf>2</inf>As<inf>2</inf>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 J_{\text{c}} in the wire at 4.2 K has reached 37 kA/cm<sup>2</sup>under self-field and 3.0 kA/cm<sup>2</sup>at 90 kOe. Magneto-optical imaging of the wire confirmed the large intergranular J_{\text{c}} in the wire core.
- 2013-12-25
著者
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Okayasu Satoru
Advanced Science Research Center Jaeri
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Tamegai Tsuyoshi
Department Of Applied Physics The University Of Tokyo
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Inoue Hiroshi
Departmcnt Of Biology Faculty Of Science Kyushu University:(present)department Of Biology Kyushu Den
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Taen Toshihiro
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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PYON Sunseng
Department of Physics, Faculty of Science, Okayama University, Okayama 700-8530, Japan
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Tsuchiya Yuji
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Ohtake Fumiaki
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Akiyama Hiroki
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Kajitani Hideki
Fusion Research and Development Directorate, Japan Atomic Energy Agency (JAEA), Naka, Ibaraki 311-0193, Japan
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Koizumi Norikiyo
Fusion Research and Development Directorate, Japan Atomic Energy Agency (JAEA), Naka, Ibaraki 311-0193, Japan
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Pyon Sunseng
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Inoue Hiroshi
Deparment of Neurosurgery, Gunma University School of Medicine and Gamma Unit Center, Hidaka Hospital
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Okayasu Satoru
Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
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TAEN Toshihiro
Department of Applied Physics, The University of Tokyo
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