Substrate effects on the properties of Y‐Ba‐Cu‐O superconducting films prepared by laser deposition
Substrate effects on the properties of Y‐Ba‐Cu‐O superconducting films prepared by laser deposition
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基底对激光沉积制备Y-Ba-Cu-O超导薄膜性能的影响
DOI：
10.1063/1.340136
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发表时间：
1988
影响因子：
3.2
通讯作者：
A. Inam
中科院分区：
文献类型：
--
作者：
T. Venkatesan;C. C. Chang;D. Dijkkamp;S. Ogale;E. Chase;L. Farrow;D. Hwang;P. Miceli;S. Schwarz;J. Tarascon;Xindi Wu;A. Inam
用激光沉积技术制备了超导转变温度（Tc）接近90 K的Y1Ba2Cu3Ox超导薄膜。我们表明，在相同的工艺条件下，蓝宝石，锂钛酸盐，钛酸锶上制备的薄膜表现出不同的电特性。薄膜的表面，界面和结晶度已经研究了一些分析技术。我们得出结论，基板的影响膜性能主要在三个方面：热膨胀失配引入裂纹的膜，界面反应改变膜的组成，和基板晶格影响的结晶取向的膜。
Superconducting thin films of Y1Ba2Cu3Ox with superconducting transition temperature (Tc) near 90 K have been prepared by a laser deposition technique. We show that films prepared on sapphire, lithium niobate, and strontium titanate under identical processing conditions exhibit different electrical characteristics. The film surfaces, interfaces, and crystallinity have been studied by a number of analytical techniques. We conclude that the substrate influences the film properties primarily in three ways: the thermal expansion mismatch introduces cracks in the film, the interface reaction changes the film composition, and the substrate lattice influences the crystallographic orientation of the film.