Abstract
The energy spectra of positive and negative ions emitted from single-crystalline Fe 3O 4 (0 0 1) and (1 1 1) surfaces under low-energy Ne + ion bombardments were investigated in the temperature range from 85 to 300 K. The characteristics of the LEIS spectra of the two surfaces are very similar. The positive-charged-ion spectra have revealed the O +-recoil and the quasi-single scattering Ne +–Fe peak, while a large broad O −1 recoil signal was observed in the negative-charged-ion ones. No change of the peak shape and of the energy position have revealed for the (0 0 1) surface, whereas the (1 1 1) one implies an appearance of a small peak around 150 K attributed to recoil-oxygen ions from the double-collisions.
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