Oxygen arrangement in FeSr $_{2}$ YCu $_{2}$ O $_{6+delta}$ system

Mochiku, Takashi*; Hata, Yoshiaki*; Tsuchiya, Yoshinori*; Igawa, Naoki ; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

FeSr $_{2}$ YCu $_{2}$ O $_{6+delta}$ structure exhibits superconductivity around 60 K, when it is properly annealed in N $_{2}$ and subsequently in O $_{2}$ . In this study, oxygen arrangement in FeSr $_{2}$ YCu $_{2}$ O $_{6+delta}$ system is investigated by the neutron diffraction method. Cu and Fe in the crystal were ordered by annealing around 700 $^{circ}$ C in N $_{2}$ due to structure phase transition from the tetragonal to monoclinic phase with a superlattice structure. It was revealed that the FeO $_{4}$ tetrahedron was formed and ordered in the crystal while disordered in the original structure without N $_{2}$ -annealing. It was observed that the FeO $_{4}$ tetrahedron changed to the octahedron by the subsequently annealing in O $_{2}$ .

Language	:	Japanese
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Meeting title	:	日本物理学会2009年秋季大会(物性)
Held date	:	2009/09
Location (city)	:	熊本
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : BB20091207
JAEA Abstracts No. :
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Oxygen arrangement in FeSrYCuO system

Oxygen arrangement in FeSr $_{2}$ YCu $_{2}$ O $_{6+delta}$ system