Ba2-xSrxCuO2CO3: A Series of Oxycarbonate Thin Films Grown by Pulsed Laser Deposition on NdGaO3 Substrates

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• 作者：W. Prellier ; A. Tebano ; J. L. Allen ; J. F. Hamet ; B. Mercey ; M. Hervieu ; and B. Raveau
• 刊名：Chemistry of Materials
• 出版年：1997
• 出版时间：January 1997
• 年：1997
• 卷：9
• 期：1
• 页码：319 - 327
• 全文大小：603K
• 年卷期：v.9,no.1(January 1997)
• ISSN：1520-5002

文摘

Monophasic thin films of the oxycarbonatesBa_2-xSr_xCuO₂CO₃have been grown by pulsedlaser deposition on [110]-oriented NdGaO₃ substrates forx = 2, 1.6, 0.9, 0.4, and 0.3. Asystematic study of these films by X-ray diffraction and transmissionelectron microscopyshows that the film orientation varies from a-axis or[110] orientation (copper layersperpendicular to the substrate) to a c-axis or [001]orientation (copper layers parallel to thesubstrate) as x decreases.Sr₂CuO₂CO₃(x = 2) is indeed a-axis oriented, whereas for0.4 <x < 1.6 these films have a [110] orientation, and finallyfor x = 1.6-1.7 the films exhibitc-axis, [110]- and [10]-oriented domains.The factors which influence the orientation ofthese films are discussed.