Ultrathin films of Fe3O4 have been grown epitaxially on nearly lattice matched MgO(001). The stability of 4 nm thick films in ambient air and under annealing in an oxygen atmosphere at 200 °C has been studied. By magneto optical and Raman measurements, we can confirm the presence of the Fe3O4 phase and the formation of a maghemite top layer passivating the Fe3O4 thin film. In a second step, we are able to demonstrate that this top layer oxidation in ambient air can be prevented by a 2 nm thick magnesium ferrite passivation layer, while a thicker 20 nm MgO layer prevents oxidation even at elevated temperatures.
Skip Nav Destination
Research Article| May 12 2014
Stability and capping of magnetite ultra-thin films
K. Fleischer, O. Mauit, I. V. Shvets; Stability and capping of magnetite ultra-thin films. Appl. Phys. Lett. 12 May 2014; 104 (19): 192401. https://doi.org/10.1063/1.4876059
Download citation file:
Don't already have an account? Register
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Could not validate captcha. Please try again.