ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 47, Number 6
JKCSEZ 47(6)
December 20, 2003 

Sr₂Ru_1-xCu_xO_4-y(0.0≤x≤0..5) compounds were prepared using a conventional solid state reaction. Based on the Rietveld refinements of X-ray diffraction results, it is revealed that Sr₂Ru_1-xCu_xO_4-y compounds are the single phases with K₂NiF₄ type tetragonal system in the range of 0=x=0.3, while the mixed phases of Sr₂RuO₄ and Sr₂CuO₃ in the range of 0.4≤x≤0.5. By means of X-ray photoelectron spectroscopy, the valence states of Ru and Cu in Sr₂Ru_1-xCu_xO_4-y, have been confirmed to 4+ and 2+, respectively. The bond length difference between Ru-O₁ (x4) and Ru-O₂ (x2) in RuO₆ octahedron is gradually decreased with increasing Cu content in Sr₂Ru_1-x Cu_xO_4-y, which results in the lower c/a ratio. So, it might be assured that the variation of local symmetry of RuO₆ octahedron is very closely related to the transporting property of Sr₂Ru_1-xCu_xO_4-y compounds. The behavior of resistivity discloses that the metallic property in Sr₂RuO₄ changes into the semiconducting one in proportion to the Cu content in Sr₂Ru_1-xCu_xO_4-y.