| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-2131 - C8-2132 | |
| DOI | https://doi.org/10.1051/jphyscol:19888953 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2131-C8-2132
DOI: 10.1051/jphyscol:19888953
1 Laboratoire CNRS-St Gobain (UM 37 CNRS) BP 109, 54704 Pont-à-Mousson, France
2 Laboratoire de Physique du Solide (UA 155 CNRS) Université de Nancy I, BP 239, 54506 Vandoeuvre-les-Nancy, France
3 LURE (LP CNRS) Bât 209 d, Université de Paris-Sud, 91405 Orsay, France
J. Phys. Colloques 49 (1988) C8-2131-C8-2132
DOI: 10.1051/jphyscol:19888953
DEPENDENCE OF THE ELECTRONIC STRUCTURE OF YBa2Cu3O7-∂ CERAMICS ON OXYGEN STOICHIOMETRY : A PHOTOEMISSION AND PHOTOABSORPTION STUDY
M. Maurer1, T. Gourieux2, G. Krill2, M. F. Ravet1, H. Tolentino3 et A. Fontaine31 Laboratoire CNRS-St Gobain (UM 37 CNRS) BP 109, 54704 Pont-à-Mousson, France
2 Laboratoire de Physique du Solide (UA 155 CNRS) Université de Nancy I, BP 239, 54506 Vandoeuvre-les-Nancy, France
3 LURE (LP CNRS) Bât 209 d, Université de Paris-Sud, 91405 Orsay, France
Abstract
X-ray photoemission (XPS) and X-ray absorption (XAS) have been performed on YBa2Cu3O7-∂ ceramics as a function of ∂ (0.1 < ∂ < 0.7). The results show the modifications of the Cu electronic structure around the superconducting-semiconducting transition. XPS and XAS experiments give complementary informations allowing the identification of Cu+, Cu2+ and the so-called Cu3+ configurations as a function of ∂.