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

doi:10.1016/j.ssc.2012.04.002

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: ジャーナルへの寄稿 › 記事 › 査読

65 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	英語
ページ（範囲）	1135-1138
ページ数	4
ジャーナル	Solid State Communications
巻	152
号	13
DOI	https://doi.org/10.1016/j.ssc.2012.04.002
出版ステータス	出版済み - 7月 2012
外部発表	はい

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10.1016/j.ssc.2012.04.002

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title = "Phase diagram and oxygen annealing effect of FeTe 1-xSe x iron-based superconductor",

abstract = "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.",

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

year = "2012",

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doi = "10.1016/j.ssc.2012.04.002",

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T1 - Phase diagram and oxygen annealing effect of FeTe 1-xSe x iron-based superconductor

AU - Kawasaki, Yasuna

AU - Deguchi, Keita

AU - Demura, Satoshi

AU - Watanabe, Tohru

AU - Okazaki, Hiroyuki

AU - Ozaki, Toshinori

AU - Yamaguchi, Takahide

AU - Takeya, Hiroyuki

AU - Takano, Yoshihiko

PY - 2012/7

Y1 - 2012/7

N2 - 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.

AB - 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.

KW - A. FeTe Se

KW - B. O -annealing

KW - D. Magnetization

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DO - 10.1016/j.ssc.2012.04.002

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SN - 0038-1098

VL - 152

SP - 1135

EP - 1138

JO - Solid State Communications

JF - Solid State Communications

IS - 13

ER -

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

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Phase diagram and oxygen annealing effect of FeTe _1-xSe _x iron-based superconductor