X-ray emission spectra and phase-structure transitions of Pb2Sr2YCu3O8+δ (δ = 01.9)
| Autor: | N.V. Dan'ko, V.V. Nemoshkalenko, A.G. Popov, Vladimir S. Melnikov, L.V. Timoshevskaja, V.N. Uvarov |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Energy Engineering and Power Technology Electron Condensed Matter Physics Spectral line Electronic Optical and Magnetic Materials Crystal Crystallography Phase (matter) Orthorhombic crystal system Emission spectrum Electrical and Electronic Engineering Electronic band structure Valence electron |
| Zdroj: | Physica C: Superconductivity. 252:313-318 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(95)00465-3 |
| Popis: | The action of the oxygen stoichiometry (δ) on crystal and electron structures of the Pb 2 Sr 2 YCu 3 O 8+δ compound is studied. The comparison of X-ray emission spectra of this compound and the related YBa 2 Cu 3 O 6+δ one is made. The different sign of change of the Cu K α 1,2 spectra for these two compounds as δ increases is pointed out. The anomalous jump of the density of the valence electrons on the Cu atoms as δ changes from 0 to 1 is connected with the phase-structural transition (C-centered orthorhombic phase → primitive orthorhombic phase). |
| Databáze: | OpenAIRE |
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