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Surface Studies of Re_{3}Fe_{5}O_{12} Garnets, ReFeO_{3} Orthoferrites and ReVO_{4} Orthovanadates

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Sobczak E., Żymierska D., Ebel H.
Acta Physica Polonica A
|
1996
|
vol. 89
|
issue 3
329-333
EN
The X-ray photoelectron spectra for Re_{3}Fe_{5}O_{12} garnets, ReFeO_{3} orthoferrites and ReVO_{4} orthovanadates have been measured by using Mg K_{α} radiation. The O 1s, Re 4d, Fe 2p, and V 2p photoelectron spectra were studied. A very big difference was observed between ReFeO_{3} orthoferrites and ReVO_{4} orthovanadates, mainly the Fe 2p_{3/2} lines were double broader than V 2p_{3/2} 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.
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