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Magnetic Properties of Ultrathin Magnetite Films Grown by Molecular Beam Epitaxy.
- Source :
- IEEE Transactions on Magnetics; Nov2008 Part 1 of 2, Vol. 44 Issue 11, p2628-2631, 4p, 1 Chart, 2 Graphs
- Publication Year :
- 2008
-
Abstract
- Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe[sub3]O[sub4]) thin films grown on MgO (100) substrates show that the small thickness films (⩽ 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe[sub3]O[sub4]. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe[sub3]O[sub4]-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe[sub3]O[sub4] is a major factor contributing to the enhancement of magnetization. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 44
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 36070976
- Full Text :
- https://doi.org/10.1109/TMAG.2008.2003173