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

    Research output: Contribution to journalArticlepeer-review

    59 Citations (Scopus)


    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.

    Original languageEnglish
    Pages (from-to)1135-1138
    Number of pages4
    JournalSolid State Communications
    Issue number13
    Publication statusPublished - 2012 Jul


    • A. FeTe Se
    • B. O -annealing
    • D. Magnetization

    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry


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