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Enhancement of superconducting properties in FeSe wires using a quenching technique

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arxiv 1112.4119 v2 pith:AZZT4DMH submitted 2011-12-18 cond-mat.supr-con

Toshinori Ozaki , Yoshikazu Mizuguchi , Satoshi Demura , Keita Deguchi , Yasuna Kawasaki , Toru Watanabe , Hiroyuki Okazaki , Hiroshi Hara
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Hiroyuki Takeya Takahide Yamaguchi Hiroaki Kumakura Yoshihiko Takano
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classification cond-mat.supr-con
keywords wiresfesequenchedhighquenchingsuperconductingtechniqueenhancement
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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 a greatly promising for fabricating FeSe wires with high Tc and high Jc, and quenched FeSe wires have high potential for superconducting wire applications.

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