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Low temperature structure of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Wuernisha, T.*; Igawa, Naoki   ; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

We have performed neutron powder diffraction of the superconducting FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+}$$$$_{delta}$$ and the nonsuperconducting FeSr$$_{2}$$Y(Cu$$_{0.95}$$Zn$$_{0.05}$$)$$_{2}$$O$$_{6+}$$$$_{delta}$$ samples at low temperature and room temperature to investigate the relation between the crystal structure ant the physical properties. Neutron diffraction study indicates that the magnetic order in this compound is not long-range order because we observed no extra reflection due to the magnetic superstructure. We have observed structural anomaly related to Cu in the superconducting sample around 30 K although we could not observe it in the nonsuperconducting sample. There is possibility of the change of the charge distribution around 30 K in the superconducting sample.



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Category:Physics, Applied



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