N.S, Raman and B, Viswanathan and T.K, Varadarajan (1992) Valency of copper in 123 oxides. Journal of Materials Science, 27 (1). pp. 6440-6446.
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Abstract
The valency of copper in freshly prepared as well as in situ high-temperature oxygen-treated 123 oxides was analysed by X-ray photoelectron spectroscopy. The results suggest the presence of Cu 2+ and Cu 3+ along with Cu +. This observation is supported by cyclic voltammograms of 123 oxides recorded in a formamide medium. The valence band of 123 oxides was probed using X-ray (MgK=) and ultraviolet (He-I) sources. It was observed that the Cu-O hybridized orbital in YBa2Cu307_ x responsible for conduction decreases with time in an ultrahigh vacuum and increases with oxygen treatment temperature.
| Item Type: | Article |
|---|---|
| Subjects: | Science > Chemistry |
| ID Code: | 286 |
| Deposited By: | INVALID USER |
| Deposited On: | 01 Mar 2007 14:50 |
| Last Modified: | 01 Mar 2007 14:50 |
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