Szczegóły publikacji
Opis bibliograficzny
Electronic states of collosal magnetoresistive manganites ${La_{0.67}Pb_{0.33}Mn_{1-x}Fe_{x}O_{3}}$ from photoemission spectroscopy / M. KOWALIK, R. ZALECKI, A. KOŁODZIEJCZYK // Acta Physica Polonica . A ; ISSN 0587-4246. — 2010 — vol. 117 no. 2, s. 277–280. — Bibliogr. s. 280. — — Dod. afiliacja M. Kowalik: Department of Physics, Rzeszów University of Technology. — Proceedings of the 8th national meeting of Synchrotron radiation users (KSUPS-8) : Podlesice, Poland, September 24–26, 2009 ; Proceedings of the XLIVth Zakopane school of Physics international symposium breaking frontiers: Submicron structures in physics and biology : Zakopane, Poland, May 18–23, 2009 / eds. Wojciech Paszkowicz, Marcin Sikora, Wojciech Szuszkiewicz. — Warsaw : Polish Academy of Sciences. Institute of Physics, 2010
Autorzy (3)
Dane bibliometryczne
| ID BaDAP | 51392 |
|---|---|
| Data dodania do BaDAP | 2010-04-16 |
| Tekst źródłowy | URL |
| DOI | 10.12693/APhysPolA.117.277 |
| Rok publikacji | 2010 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Acta Physica Polonica, A |
Abstract
The electron photoemission spectra, of valence bands and core-level states of manganese perovskite La0.67Pbo.33(Mn1-xFe x)03 with x = 0, 0.01, 0.03, 0.06, 0.10 and 0.15 were measured by the X-ray and Ultraviolet Photoemission Spectroscopy (XPS and UPS) below and above the metal-insulator transition. From analysis of the Mn 2p core-level spectra the ratio Mn3-/Mn4+ was calculated as a function of the iron content. Comparison of the valence band spectrum with band structure calculations and with the high-resolution spectra, measured at synchrotron radiation for Ca-, Bar and Ce- substituted manganites revealed the strong hybridisation of Mn 3d and of O 2p states between -3 eV and -7 eV, and no estimated oxygen states between 0 eV and -2 eV where the Mn-3d states play a predominant role. The composition dependent insulating energy gaps were measured at room temperature. Reasons for the behaviour were discussed taking into account previous analysis of XPS/UPS spectra, of other manganese perovskites.
