Ruthenium-based layered cuprates RuSr2LnCu2O8 and RuSr2(Ln1+xCe1−x)Cu2O10 (LnSm, Eu and Gd)
作者： L. Bauernfeind , W. Widder , H.F. Braun
DOI: 10.1016/0921-4534(95)00574-9
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摘要: Abstract We synthesized layered cuprates where the intermediate layer between CuO 2 blocks consists of vertex sharing RuO 6 octahedra. The (idealized) stoichiometries these compounds are RuSr LnCu O 8 (Ru-1212) and (Ln 1+ x Ce 1− ) Cu 10 (Ru-1222), Ln is one three neighboring lanthanides Sm, Eu Gd. analogy to isostructural Nb based compounds, as well simple valence counting, suggest that Ru pentavalent in compounds. Both 1212 1222 semiconducting when prepared air rapidly cooled room temperature. Metallic behavior superconductivity can be achieved for various compositions upon appropriate annealing.
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