DIRECT HIGH-RESOLUTION ELECTRON-MICROSCOPY OBSERVATION OF NONUNIT-CELL NUCLEATION IN THE INITIAL-STAGE OF HIGH-T-C SUPERCONDUCTING FILM GROWTH

被引:31
作者
WEN, JG [1 ]
MORISHITA, T [1 ]
KOSHIZUKA, N [1 ]
TRAEHOLT, C [1 ]
ZANDBERGEN, HW [1 ]
机构
[1] DELFT UNIV TECHNOL,NATL CTR HREM,2628 AL DELFT,NETHERLANDS
关键词
D O I
10.1063/1.113336
中图分类号
O59 [应用物理学];
学科分类号
摘要
The relationship between the starting and ending atomic layers of YBa2Cu3O7-x and Bi2Sr2CaCu2O8 thin films is studied by high-resolution electron microscopy. Experimental results show that the starting atomic layer of the thin film is determined by surface chemistry and the interaction between the thin film and the substrate, while the ending layer of the thin film is thermodynamically determined by the high-Tc cuprate itself. Therefore, nonunit cell nucleation is often observed in certain cases. The surface atomic layers of YBa2Cu3O7-x and Bi2Sr2CaCu2O8 were found to be the CuO layer and single BiO layer, respectively.© 1995 American Institute of Physics.
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页码:1830 / 1832
页数:3
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