New series of layered cuprates (ACuO{sub 2.5}){sub 2}(ATiO{sub 3}){sub m}: Dy{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 2}Ti{sub 4}O{sub 17}, m=4

Journal Article · Wed Sep 18 04:00:00 EDT 1996 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja961967z· OSTI ID:420901

Otzschi, K D ^[1]; Poeppelmeier, K R; Salvador, P A; Mason, T O; Zhang, H; Marks, L D ^[2]

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1. Univ. of Tokyo (Japan)
2. Northwestern Univ., Evanston, IL (United States)

We have investigated the structural, electrical, magnetic, and point defect properties of the quadruple-perovskite family Ln{sub 2}Ba{sub 2}Cu{sub 2}M{sub 2}O{sub 11}; (Ln = La-Tb, M = Ti, Sn) as a function of the constituent Ln and M atoms. Superconductivity has not been observed in this system, to date, probably because of both the relatively long in-plane Cu-O distance (>= 1.94 A), which prevents interaction between Cu-3d and O-2p orbitals, and limited doping by alkaline earth substitution for the rare earth constituents. In order to understand the lack of superconductivity in these layered copper titanates, we have focused our attention on related materials with in-plane Cu-O bond distances more amenable to hole-doped superconductivity. 11 refs., 2 figs.

• OSTI ID: 420901
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 37 Vol. 118; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CUPRATES
ELECTRONIC STRUCTURE
HIGH-TC SUPERCONDUCTORS
MOLECULAR STRUCTURE
SUPERCONDUCTIVITY
SYNTHESIS
X-RAY DIFFRACTION