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Enhancement of superconducting properties in FeSe wires using a quenching technique

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

Published 6 January 2012

KEYWORDS and PACS
Keywords
PACS
  • 84.71.Mn
    Superconducting wires, fibers, and tapes
  • 74.25.F-
    Transport properties
  • YEAR: 2011
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PUBLICATION DATA
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Toshinori Ozaki,1,4 Yoshikazu Mizuguchi,2,4 Satoshi Demura,1,3,4 Keita Deguchi,1,3,4 Yasuna Kawasaki,1,3,4 Tohru Watanabe,1,3 Hiroyuki Okazaki,1,4 Hiroshi Hara,1,4 Hiroyuki Takeya,1,4 Takahide Yamaguchi,1,4 Hiroaki Kumakura,1,3,4 and Yoshihiko Takano1,3,4
1National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
2Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji 192-0397, Japan
3University of Tsukuba, 1-1-1Tennnodai, Tsukuba, Ibaraki 305-0047, Japan
4JST, Transformative Research-Project on Iron Pnictides, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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
History: Received 27 October 2011; accepted 29 November 2011; published 6 January 2012
Digital Object Identifier: http://dx.doi.org/10.1063/1.3673826

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