Publication Type:Journal Article
Source:Materials Letters, Volume 10, Number 1-2, p.23-27 (1990)
Keywords:Cationic Vacancy Ordered Defect Structure, Laser Beams–Applications, Laser-Deposited Thin Films, Stacking Defects, Superconducting Films–Thin Films, Superconducting materials, Yttrium Barium Copper Oxide Thin Films, Yttrium Compounds–Thin Films
The Y2Ba4Cu8O16 phase is the most common stacking defect observed in laser-deposited YBaCuO thin films. In this we report for the fist time, the existence of a cationic vacancy ordered Y2Ba4Cu8O16 structure in which every alternate pair of Cu atoms in the two chain layers are missing. This new structure is a polytype of the Y1Ba2Cu3O7 phase, i.e. it has the "Y2Ba4Cu8O16" structure but the "Y1Ba2Cu3O7" composition. Some possible causes and consequences of the formation of this defect structure are discussed. © 1990.
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