Surface Studies of Re3Fe5O12 Garnets, ReFeO3 Orthoferrites and ReVO4 Orthovanadates
E. Sobczak, D. Żymierska
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

and H. Ebel
Institute of Applied and Technical Physics, Technical University of Vienna, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria
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The X-ray photoelectron spectra for Re3Fe5O12 garnets, ReFeO3 orthoferrites and ReVO4 orthovanadates have been measured by using Mg Kα radiation. The O 1s, Re 4d, Fe 2p, and V 2p photoelectron spectra were studied. A very big difference was observed between ReFeO3 orthoferrites and ReVO4 orthovanadates, mainly the Fe 2p3/2 lines were double broader than V 2p3/2 ones, and the O 1s line is split by about 1.6 eV for orthoferrites, while this line is single for orthovanadates. The O 1s peak at 531.8 eV with intensity about 70% of the main peak is interpreted as originated from a charge fluctuation between oxygen and iron ions due to superexchange interaction.
DOI: 10.12693/APhysPolA.89.329
PACS numbers: 79.60.-i, 75.30.Et, 71.70.Gm