Cobalt-Substitution-Induced Superconductivity in a New Compound with ZrCuSiAs-Type Structure, SrFeAsF(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• We have synthesized a quaternary fluoroarsenide SrFeAsF with the ZrCuSiAs-type structure(P4/nmm,a=0.3999 and c=0.8973nm), which is composed of an alternately stacked (FeAs)^<δ-> and (SrF)^<δ+> layers, analogous to the FeAs-based superconductor LaFeAsO. SrFeAsF shows metallic type conduction with the anomaly at 〜180K. The partial replacement of the Fe with Co suppresses the anomaly and induces the superconductivity, while the maximal T_c (4K for SrFe_<0.875>Co_<0.125>AsF) is much lower than that of the Co-substituted LaFeAsO. Replacement of (LaO)^<δ+> layers with (SrF)^<δ+> layers results in a enlargement of the c-axis length (+2.6%). These results suggest the importance of interlayer interaction as a critical T_c-controlling factor in FeAs-based superconductors.

• 社団法人日本物理学会の論文
• 2008-11-15

著者

• Matsui Hiroaki

  Frontier Research Center Tokyo Institute Of Technology:erato-sort Jst In Frontier Research Center To

• Hirano M

  Frontier Research Center Tokyo Institute Of Technology:erato-sorst Jst Frontier Research Center Toky

• Hosono Hideo

  Frontier Research Center Tokyo Institute Of Technology:erato-sort Jst In Frontier Research Center To

• Hosono H

  Materials And Structures Laboratory Tokyo Institute Of Technology

• Hirano M

  Transparent Electro-active Materials Project Erato-sorst Japan Science And Technology Agency C/o Fro

• Hirano Masahiro

  Frontier Collaborative Research Center Tokyo Institute Of Technology

• Hosono Hideo

  Tokyo Inst. Technol. Yokohama Jpn

• Hosono Hideo

  Tokyo Inst. Technol. Yokohama

• Hosono H

  Nagoya Inst. Technology Nagoya

• Hosono Hideo

  Frontier Collaborative Research Center Tokyo Institute Of Technology

• MATSUISHI Satoru

  Frontier Research Center, Tokyo Institute of Technology

• INOUE Yasunori

  Materials and Structures Laboratory, Tokyo Institute of Technology

• NOMURA Takatoshi

  Materials and Structures Laboratory, Tokyo Institute of Technology

• Hirano Masahiro

  Frontier Research Center Tokyo Institute Of Technology:erato-sort Jst In Frontier Research Center To

• Hosono Hideo

  Erato-sorst Jst Frontier Collaborative Research Center Tokyo Institute Of Technology

• Hirano M

  Asahi Glass Co. Ltd Research Center

• Hirano Masahiro

  Solution-oriented Research For Science And Technology (erato-sorst) Japan Science And Technology Age

• Matsuishi Satoru

  Frontier Research Center Tokyo Institute Of Technology

• HANEDA Hajime

  Optical and Electronic Materials Unit, National Institute for Materials Science

• Inoue Yasunori

  Materials And Structures Laboratory Tokyo Institute Of Technology

• Hirano Masahiro

  Transparent Electro-active Materials Project Erato-sorst Japan Science And Technology Agency

• Matsui Hiroaki

  Erato-sorst Japan Science And Technology Agency (jst) And Frontier Research Center Tokyo Institute O

• Nomura Takatoshi

  Materials And Structures Laboratory Tokyo Institute Of Technology

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