X-ray emission and photoelectron spectra, and the location of fluorine atoms in strontium and calcium copper oxyfluorides
Autor(en): | Kurmaev, EZ Elokhina, LV Fedorenko, VV Bartkowski, S Neumann, M Greaves, C Edwards, PP Slater, PR Francesconi, MG |
Stichwörter: | Physics; Physics, Condensed Matter | Erscheinungsdatum: | 1996 | Herausgeber: | IOP PUBLISHING LTD | Journal: | JOURNAL OF PHYSICS-CONDENSED MATTER | Volumen: | 8 | Ausgabe: | 26 | Startseite: | 4847 | Seitenende: | 4854 | Zusammenfassung: | X-ray emission and photoelectron spectra of Sr2CuO2F2+delta, Sr1.4Ba0.6CuO2F2+delta. CaSrCuO2F2+delta, and Ca2CuO2F2+delta cuprates are presented. It is found that the XPS F 1s binding energies of Sr2CuO2F2+delta and Ca2CuO2F2+delta are different (Delta E similar to 1.3 eV) and those of Sr1.4Ba0.6CuO2F2+delta and CaSrCuO2F2+delta have intermediate values. These differences in x-ray photoelectron spectra are attributed to the different preferential location of fluorine atoms in structures related to La2CuO4 and Nd2CuO4. The results obtained are in accordance with measurements of F K alpha x-ray emission spectra of the same compounds. |
ISSN: | 09538984 | DOI: | 10.1088/0953-8984/8/26/016 |
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geprüft am 29.04.2024