| Autor: |
ABBATE, M, DEGROOT, FMF, FUGGLE, JC, FUJIMORI, A, STREBEL, O, LOPEZ, F, DOMKE, M, KAINDL, G, SAWATZKY, GA, TAKANO, M, TAKEDA, Y, EISAKI, H, UCHIDA, S |
| Jazyk: |
angličtina |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Physical Review. B: Condensed Matter and Materials Physics, 46(8), 4511-4519. AMER PHYSICAL SOC |
| ISSN: |
0163-1829 |
| Popis: |
The controlled-valence properties of La1-xSrxFeO3 and La1-xSrxMnO3 are studied by means of soft-x-ray absorption spectroscopy. A comparison between the transition-metal 2p spectra and atomic-multiplet calculations is used to determine the 3d count. The 0 Is spectrum is used to characterize changes in unoccupied states that contain oxygen p character. The results indicate that the holes induced by substitution for both series are located in states of mixed metal 3d -oxygen 2p character. The ground state of LaFeO3 is mainly 3d5 and becomes 3d5L (where L denotes a ligand hole) in the La1-xSrxFeO3 series for low Sr concentration. The main component of the ground state of LaMnO3 is 3d4 and becomes a mixture of 3d3 and 3d4L in the La1-xSrxMnO3 series. The trends in controlled-valence properties of similar oxides across the transition-metal series can be rationalized within the framework of the Zaanen-Sawatzky-Allen model. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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