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20 February 1998 Spiral growth pattern of high-Tc superconducting thin films by laser deposition
Biao Su, Yongqing Wang, Chengwu An, Yongchang Fan, Jinglian Dai, Dongsheng Lu
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Proceedings Volume 3175, Third International Conference on Thin Film Physics and Applications; (1998) https://doi.org/10.1117/12.300668
Event: Third International Conference on Thin Film Physics and Applications, 1997, Shanghai, China
Abstract
In-situ laser deposition was used to fabricate YBa2Cu3O7-x superconducting films on YSZ substrates. The surface topography of YBa2Cu3O7-x thin films has been studied with both atomic force microscopy (AFM) and scanning tunneling microscopy (STM). A stepped surface is clearly observed on the mounds with a single step edge the originates from a screw dislocation at the center of the mound and moves out to the edge in a spiral fashion. The experimental result show that the spiral growth structure is an intrinsic character of superconductor films. The existence or absence of the spiral growth structure and the quality of the spiral structures may have significant implications for properties of the high temperature superconducting thin films. The new visual details may lead to improvements of YBCO films.
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Biao Su, Yongqing Wang, Chengwu An, Yongchang Fan, Jinglian Dai, and Dongsheng Lu "Spiral growth pattern of high-Tc superconducting thin films by laser deposition", Proc. SPIE 3175, Third International Conference on Thin Film Physics and Applications, (20 February 1998); https://doi.org/10.1117/12.300668
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KEYWORDS
Superconductors
Thin films
Atomic force microscopy
Copper
Scanning tunneling microscopy
Visualization
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