Observation of iron diffusion in the near-surface region of magnetite at 470 K

The authors study interdiffusion of Fe-cations between homoepitaxially grown 57Fe3O4 films and (001) oriented Fe3O4 substrates in the temperature range of 470-770 K under high vacuum by neutron reflectivity and time-of-flight secondary ion mass spectrometry. The paper estimates diffusion lengths in the order of 20-50 \AA{} and diffusion constants in the order of 10-20 m2/s.