CONTROLLED-VALENCE PROPERTIES OF LA1-XSRXFEO3 AND LA1-XSRXMNO3 STUDIED BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY

M ABBATE*, FMF DEGROOT, JC FUGGLE, A FUJIMORI, O STREBEL, F LOPEZ, M DOMKE, G KAINDL, GA SAWATZKY, M TAKANO, Y TAKEDA, H EISAKI, S UCHIDA

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    652 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)4511-4519
    Number of pages9
    JournalPhysical Review. B: Condensed Matter and Materials Physics
    Volume46
    Issue number8
    Publication statusPublished - 15-Aug-1992

    Keywords

    • ENERGY-LOSS-SPECTROSCOPY
    • TRANSITION-METAL OXIDES
    • MOLECULAR-ORBITAL STRUCTURE
    • EDGE FINE-STRUCTURE
    • ELECTRONIC-STRUCTURE
    • BAND PHOTOEMISSION
    • UNOCCUPIED STATES
    • SPECTRA
    • LIXNI1-XO
    • SYMMETRY

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