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Synthesis structure and superconductivity in all-perovskite-layered titanium cuprates

AuthorsPalacín, M. Rosa ; Fuertes, Amparo ; Casañ Pastor, Nieves ; Gómez-Romero, P.
Issue Date1995
CitationJournal of Solid State Chemistry 119(2): 224-236 (1995)
AbstractA study on the reaction pathways, the synthesis, and the range of stability of complex perovskites in the system Ln-(Sr/Ba) CuTi is reported. Several possibilities for the Cu : Ti stoichiometry were explored with the aim of isolating potentially superconducting layered phases. A bulk superconducting phase of the formula YSr2 Cu2.7Ti0.3O8-δ with a Tc of 26 K was isolated and a whole family of layered oxides of the formula Ln2Ba2Cu2Ti2O11-δ was characterized. We have determined the limits of this family which extends from Ln = La to Tb. The studies reported include X-ray and electron diffraction, and TGA and magnetic susceptibility measurements. Structural and magnetic correlations for these oxides are analyzed.
Identifiersdoi: 10.1016/0022-4596(95)80036-O
issn: 0022-4596
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