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Monitoring of the surface decomposition of YBaCuO and LaSrCuO by electron spectroscopy

✍ Scribed by M.G. Ramsey; F.P. Netzer

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
655 KB
Volume
2
Category
Article
ISSN
0921-5107

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✦ Synopsis

~lhe surfaces of the high Tc superconductors La-Sr-Cu-O and Y-Ba-Cu-O have been characterized by the laboratory-accessible techniques of ultraviolet photoelectron electron spectroscopy, electron energy loss spectroscopy and Auger electron spectroscopy. The damage to the surfaces due to the time in ultrahigh vacuum and electron beam irradiation have been followed by the various techniques which indicate a loss of oxygen. 7he decomposition of the surfaces due to heating has also been investigated. Oxygen is seen to be liberated from the samples and, as evidenced in all spectroscopy techniques, copper is completely driven from the surfaces until insulating surface layers of La-Sr-O and Ba-O are formed.

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