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Browse Journals & Magazines > Applied Superconductivity, IE ...> Volume:13 Issue:2 Help

Microstructural study in heteroepitaxial YBa2Cu3O7/Nd2CuO4 multi-layers by using electron microscopy

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3 Author(s)
Gao, J. ; Dept. of Phys., Univ. of Hong Kong, China ; Cheung, Y.L. ; So, S.M.

Neodymium copper oxide Nd2CuO4 (NCO) has been applied as a buffer material to improve the epitaxy of YBa2Cu3O7 (YBCO) thin films on reactive substrates and as a potential barrier to construct multi-layer junctions. The microstructures and interfaces in heteroepitaxial Nd2CuO4/YBCO multi-layer have been characterized by using an electron microscopy. Cross-sectional images obtained on a transmission electron microscopy (TEM) revealed an atomically sharp boundary between layers, underlining the excellent compatibility of NCO with YBCO. No chemical reaction occurred between film and substrate. It was found that all layers grow highly epitaxially with their c-axis perpendicular to the substrate surface. On the other hand, various defects such as mis-oriented grains and stacking faults were found near the interfaces.

Published in:
Applied Superconductivity, IEEE Transactions on  (Volume:13 ,  Issue: 2 )

Date of Publication: June 2003

Page(s):
885 - 888
ISSN :
1051-8223
INSPEC Accession Number:
7715494
Digital Object Identifier :
10.1109/TASC.2003.814059
Product Type:
Journals & Magazines
Date of Current Version :
15 July 2003
Issue Date :
June 2003
Sponsored by :
The IEEE Council on Superconductivity

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