XPS STUDY OF PB/YBACUO THIN-FILM TUNNEL CONTACT

被引：6
|
作者：
SARAPATKA, TJ
MIKUSIK, P
机构：
[1] J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Academy of Sciences of the Czech Republic, 18223 Prague
来源：
APPLIED SURFACE SCIENCE | 1993年 / 68卷 / 01期
关键词：
D O I：
10.1016/0169-4332(93)90213-U
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The nature of the chemical interaction between a Pb overlayer and a usual YBa2Cu3O6.9 thin-film surface is studied by X-ray photoelectron spectroscopy (XPS). It is found that Pb withdraws oxygen preferentially from the high-T(c) superconducting (HTSC) phase where it reduced Cu selectively in a time comparable with the Pb decomposition time. This relatively fast process is followed by a much slower outdiffusion of oxygen from the deeper layers of the HTSC grains and thus it changes the characteristics of the tunnel junction in time. Temperature, vacuum and Ar+ sputtering effects on the YBaCuO thin-film surfaces are discussed, too.
引用
收藏
页码：35 / 40
页数：6
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