Acta Physica Polonica B

Vol. 34, No. 22, February 2003, page 1527

Photoemission Electronic States and Correlation Energies of Magnetite Based Compounds

R. Zalecki, A. Kolodziejczyk, W. Tokarz, A. Kozlowski, Z. Kakol

The photoemission spectra (XPS/UPS) for iron oxides, stoichiometric magnetite and for selected Ti and Zn doped magnetite single crystals are presented. From the Fe-3s split lines the exchange energies for FeO, Fe2O3 and magnetite based samples were estimated. It was shown that Ti and Zn ions are of 4+ and 2+ valency, respectively. The correlation energies were estimated from the Fe 2p3/2 core-level spectra and from the L3-M4,5,M4,5 Auger lines. The type of insulating gap in these compounds was discussed.

PACS numbers: 79.60.--i, 71.22.+i, 71.27.+a, 71.20.Ps

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