| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10670209 | Thin Solid Films | 2011 | 8 Pages |
Abstract
The electronic and magnetic properties of epitaxial Fe3O4 (001) films on MgO(100) substrates were studied throughout the 2.5- to 30-nm thickness range using conversion electron Mössbauer spectroscopy. Despite the superparamagnetism that was observed for film thickness below 5Â nm, the Verwey transition persisted even for the thinnest film. Temperature-dependent Mössbauer measurements between 80Â K and 400Â K revealed that the activation energy for the magnetic moment fluctuations in the 3-nm magnetite film is higher than the magnetic anisotropy energy by an order of magnitude.
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Materials Science
Nanotechnology
Authors
M. ZajÄ
c, K. Freindl, T. ÅlÄzak, M. ÅlÄzak, N. Spiridis, D. Wilgocka-ÅlÄzak, J. Korecki,