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A layered structure is the thermodynamically stable form of the perovskite Ln 2 Ba 2 Cu 2 Ti 2 O 11 (Ln = La) prepared at 1100°C. But contrary to other derivatives with Ln = Nd-Tb variable degrees of order/disorder associated with the concentration of defects can be detected depending on the extension of the synthetic treatments. This oxide was prepared...
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