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J. Appl. Phys. 111, 013912 (2012); http://dx.doi.org/10.1063/1.3673826 (4 pages)

Enhancement of superconducting properties in FeSe wires using a quenching technique

Toshinori Ozaki1,2, Yoshikazu Mizuguchi3,2, Satoshi Demura1,4,2, Keita Deguchi1,4,2, Yasuna Kawasaki1,4,2, Tohru Watanabe1,4, Hiroyuki Okazaki1,2, Hiroshi Hara1,2, Hiroyuki Takeya1,2, Takahide Yamaguchi1,2, Hiroaki Kumakura1,4,2, and Yoshihiko Takano1,4,2

1National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
2JST, Transformative Research-Project on Iron Pnictides, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
3Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji 192-0397, Japan
4University of Tsukuba, 1-1-1Tennnodai, Tsukuba, Ibaraki 305-0047, Japan

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(Received 27 October 2011; accepted 29 November 2011; published online 6 January 2012)

Enhancements of superconducting properties were observed in FeSe wires using a quenching technique. Zero resistivity was achieved at about 10 K in quenched wires, which is about 2 K higher than that of polycrystalline FeSe bulk. Furthermore, transport Jc of quenched wires showed three times higher than that of furnace-cooled wires. In contrast, the quenched polycrystalline FeSe bulks did not show the enhancement of Tc. The quenching technique is greatly promising for fabricating FeSe wires with high Tc and high Jc, and quenched FeSe wires have high potential for superconducting wire applications.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSION

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0021-8979 (print)  
1089-7550 (online)

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