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FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$系における構造的な乱れと物性

Disorder and physical properties in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

茂筑 高士*; 畑 慶明*; 星川 晃範*; 岩瀬 謙二*; Sulistyanintyas, D.*; 小黒 英俊*; 石垣 徹*; 井川 直樹   ; 土屋 佳則*; 岩井 秀夫*; 安岡 宏*; 平田 和人*

Mochiku, Takashi*; Hata, Yoshiaki*; Hoshikawa, Akinori*; Iwase, Kenji*; Sulistyanintyas, D.*; Oguro, Hidetoshi*; Ishigaki, Toru*; Igawa, Naoki; Tsuchiya, Yoshinori*; Iwai, Hideo*; Yasuoka, Hiroshi*; Hirata, Kazuto*

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$系には、CuとFeの相互置換,酸素欠損を要因とする構造的な乱れがあり、超伝導と反強磁性的な磁気秩序の発現に大きく影響している。本報では、中性子回折により構造的な乱れや低温での構造変化を解析し、構造的な乱れと、超伝導,磁性との関連を議論する。

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ is expected to coexhibit superconductivity and magnetism, which has a tetragonal structure with the oxygen defect and the substitution between Cu and Fe. We have performed neutron powder diffraction of the FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ system to investigate the relation between the crystal structure and the physical properties.

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