Summary

• Surface Termination of Natural _-Fe2O3 (0001) Surface

  • Ar+ sputtering and Annealing in Vacuum(_ 5800C) : Preferential sputtering of oxygen anions _ Fe3O4(111) Termination
  • Further Ar+ sputtering and Annealing in Vacuum/O2 at higher temperature(_5800C) _ Biphase(FeO + Fe2O3) Termination
  • In between _ Mixture of Fe3O4(111) + Biphase(FeO + Fe2O3) or Fe3O4(111) + FeO(111)

• Surface Reaction: CCl4 RT dosing

  • Fe3O4(111): Reacts with CCl4 _ Cl appears bright on Fe-Terminated surface, defects on O-Terminated surface due to abstraction
  • FeO(111)/Biphase: do not react with CCl4(No bright spots, No defects seen)

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