ARXPS-, SEM-, and SAM-studies of highly textured YBa2Cu3O(x)-films

The electric conduction in the new cuprate superconductors suffers from intragrain and intergrain weak links. In transition metal oxides weak links show up in a specific chemistry, which can be measured by X-ray photoelectron spectroscopy and by Auger electron spectroscopy. To measure a defective lo...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1989-03, Vol.25, p.2328-2332
Main Authors: Halbritter, J, Haeuser, B, Keim, E G, Mathes, H-J, Walk, P
Format: Article
Language:English
Online Access:Get full text
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Summary:The electric conduction in the new cuprate superconductors suffers from intragrain and intergrain weak links. In transition metal oxides weak links show up in a specific chemistry, which can be measured by X-ray photoelectron spectroscopy and by Auger electron spectroscopy. To measure a defective local chemistry, the chemical signature of the reaction cinder has to be identified and the chemical signature of the perfect crystal has to be established. For highly textured cuprate films this has been done successfully, yielding the signature of the reaction cinder, e.g., BaO2 or graphite, the signature of the interface reactions, e.g., Ba-aluminate on Al2O3 or Cu diffusion into MgO, and the signature of c-axis surfaces being a BaO(x) layer on YBa2Cu3O(x), which results in a 1-nm-thick insulating layer. (I.E.)
ISSN:0018-9464