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Subject Keyword MATERIALS SCIENCE ♦ LANTHANUM OXIDES ♦ SYNTHESIS ♦ CRYSTAL STRUCTURE ♦ STRONTIUM OXIDES ♦ COPPER OXIDES ♦ TITANIUM OXIDES ♦ TETRAGONAL LATTICES ♦ POWDERS ♦ LATTICE PARAMETERS ♦ CALCINATION ♦ X-RAY DIFFRACTION ♦ ELECTRON DIFFRACTION ♦ VACANCIES ♦ STOICHIOMETRY
Abstract A new mixed cuprate-titanate compound with nominal composition of La{sub 2}Sr{sub 4}Cu{sub 2}Ti{sub 2}O{sub 13} has been prepared. Cell parameters of {alpha} = 3.8818(1) {angstrom} and c = 20.3118(6) {angstrom} have been obtained from indexing the X-ray diffraction (XRD) patterns of the samples. The structure refined from the XRD pattern showed that the compound is related to Ruddlesden-Popper phase with Cu and Ti statistically occupying the Ti position in Sr{sub 3}Ti{sub 2}O{sub 7}. The oxygen vacancies were found at apical sites between the double Cu/Ti-O layers. The author was unable to make the samples superconducting or more conductive due to the disordered nature of Ti/Cu occupation and oxygen vacancies in the samples.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-05-01
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 31
Issue Number 5


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