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ID 58215
フルテキストURL
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著者
Eguchi, Ritsuko Research Institute for Interdisciplinary Science, Okayama University ORCID Kaken ID researchmap
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 Kaken ID researchmap
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 ORCID Kaken ID publons researchmap
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.
キーワード
iron-based superconductor
thin crystals
microbeam XRD
発行日
2020-03-16
出版物タイトル
Materials Research Express
7巻
3号
出版者
IOP Publishing
開始ページ
036001
ISSN
2053-1591
資料タイプ
学術雑誌論文
言語
English
OAI-PMH Set
岡山大学
著作権者
© 2020 The Author(s).
論文のバージョン
publisher
DOI
Web of Science KeyUT
関連URL
isVersionOf https://doi.org/10.1088/2053-1591/ab7c85
ライセンス
https://creativecommons.org/licenses/by/4.0/
助成機関名
文部科学省
助成番号
23684028
22244045
24654105
18K04940
19H02676