PbBaYSrCu sub 3 O sub 8 : A new member of the intergrowth family (ACuO sub 3-x ) sub m (A prime O) sub n

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(89)90116-3· OSTI ID:7144500

Rouillon, T; Retoux, R; Groult, D; Michel, C; Hervieu, M; Provost, J; Raveau, B ^[1]

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1. Laboratoire de Cristallographie et Sciences des Materiaux, Caen (France)

A new member of the intergrowth family (ACuO{sub 3-x}){sub m}(A{prime}O){sub n} has been isolated. YbBaYSrCu{sub 3}O{sub 8} represents the member (m = 3; n = 1). Its structure is formed by stacking (A{prime}O){infinity} single rock-salt-type layers (A{prime} = Pb, Ba) and triple oxygen-deficient perovskite layers (A{sub 3}Cu{sub 3}O{sub 7}){infinity} (A = Ba, Pb, Sr, Y). Each perovskite layer for different m = 3 members is formed of two pyramidal (CuO{sub 2.5}){infinity} layers and one (CuO){infinity} layer of corner-sharing CuO{sub 4} square planar group interleaved with Y and Sr ions. The as-synthesized compound is not a superconductor, but evidence of superconductivity at 50 K (less than 1%) is observed by introduction of calcium. A preliminary electron microscopy investigation of this phase shows that it exhibits a modulated structure. 13 refs., 5 figs.

• OSTI ID: 7144500
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 78:2; ISSN 0022-4596; ISSN JSSCB
• Country of Publication: United States
• Language: English

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