ID | 58215 |
フルテキストURL | |
著者 |
Eguchi, Ritsuko
Research Institute for Interdisciplinary Science, Okayama University
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Senda, Megumi
Graduate School of Natural Science and Technology, Okayama University
Uesugi, Eri
Graduate School of Natural Science and Technology, Okayama University
Goto, Hidenori
Research Institute for Interdisciplinary Science, Okayama University
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Fujiwara, Akihiko
Department of Nanotechnology for Sustainable Energy, Kwansei Gakuin University
Imai, Yasuhiko
Japan Synchrotron Radiation Research Institute (JASRI)
Kimura, Shigeru
Japan Synchrotron Radiation Research Institute (JASRI)
Noji, Takashi
Department of Applied Physics, Tohoku University
Koike, Yoji
Department of Applied Physics, Tohoku University
Kubozono, Yoshihiro
Research Institute for Interdisciplinary Science, Okayama University
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抄録 | We investigated the temperature dependence of resistivity in thin crystals of FeSe1-xTex (x = 1.0, 0.95, and 0.9), though bulk crystals with 1.0 x 0.9 are known to be non-superconducting. With decreasing thickness of the crystals, the resistivity of x = 0.95 and 0.9 decreases and reaches zero at a low temperature, which indicates a clear superconducting transition. The anomaly of resistivity related to the structural and magnetic transitions completely disappears in 55- to 155-nm-thick crystals of x = 0.9, resulting in metallic behavior in the normal state. Microbeam x-ray diffraction measurements were performed on bulk single crystals and thin crystals of FeSe1-xTex. A significant difference of the lattice constant, c, was observed in FeSe1-xTex, which varied with differing Te content (x), and even in crystals with the same x, which was mainly caused by inhomogeneity of the Se/Te distribution. It has been found that the characteristic temperatures causing the structural and magnetic transition (T-t), the superconducting transition (T-c), and the zero resistivity (T-c(zero)) are closely related to the value of c in thin crystals of FeSe1-xTex.
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キーワード | iron-based superconductor
thin crystals
microbeam XRD
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発行日 | 2020-03-16
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出版物タイトル |
Materials Research Express
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巻 | 7巻
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号 | 3号
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出版者 | IOP Publishing
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開始ページ | 036001
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ISSN | 2053-1591
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © 2020 The Author(s).
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論文のバージョン | publisher
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DOI | |
Web of Science KeyUT | |
関連URL | isVersionOf https://doi.org/10.1088/2053-1591/ab7c85
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ライセンス | https://creativecommons.org/licenses/by/4.0/
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助成機関名 |
文部科学省
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助成番号 | 23684028
22244045
24654105
18K04940
19H02676
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