Phase diagram and oxygen annealing effect of FeTe 1-xSe x iron-based superconductor

Yasuna Kawasaki, Keita Deguchi, Satoshi Demura, Tohru Watanabe, Hiroyuki Okazaki, Toshinori Ozaki, Takahide Yamaguchi, Hiroyuki Takeya, Yoshihiko Takano

    研究成果: Article査読

    59 被引用数 (Scopus)

    抄録

    Phase diagrams of as-grown and O 2-annealed FeTe 1-xSe x determined from magnetic susceptibility measurement were obtained. For as-grown samples, the antiferromagnetic order was fully suppressed in the range region x≥0.15, and weak superconductivity appeared when x≥0.1. Beginning at x=0.5, weak superconductivity was found to evolve into bulk superconductivity. Interestingly, for O 2-annealed samples, complete suppression of magnetic order and the occurrence of bulk superconductivity were observed when x≥0.1. We found that O 2-annealing induces bulk superconductivity for FeTe 1-xSe x. Oxygen probably plays a key role in the suppression of the magnetic order and the appearance of bulk superconductivity.

    本文言語English
    ページ(範囲)1135-1138
    ページ数4
    ジャーナルSolid State Communications
    152
    13
    DOI
    出版ステータスPublished - 2012 7月

    ASJC Scopus subject areas

    • 化学 (全般)
    • 凝縮系物理学
    • 材料化学

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