Microstructural features at the interface between laser ablated YBa2Cu3O7films and LaAlO3substrates
作者:
L. P. Guo,
Y. J. Tian,
J. Z. Liu,
S. F. Xu,
L. Li,
Z. X. Zhao,
Z. H. Chen,
D. F. Cui,
H. B. Lu,
Y. L. Zhou,
G. Z. Yang,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 66,
issue 24
页码: 3356-3358
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.113756
出版商: AIP
数据来源: AIP
摘要:
The microstructure at the interface between YBa2Cu3O7(YBCO) thin film and (100)LaAlO3substrate has been investigated by using transmission electron microscopy. It has been observed that two distinct microstructural features existed in the interface: (1) A thin transitional layer of Ba3Al2O6was frequently observed and the YBCO thin film grown on it showed stacking faults. (2) Sharp interface with no transitional layer was also occasionally observed and the YBCO film grown on it was single crystalline. In rare cases, a low symmetry phase was observed near the surface of the LaAlO3substrate, however, the distortion caused by the lattice mismatch between this phase and the YBCO did not affect the quality of the YBCO thin film. ©1995 American Institute of Physics.
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