iron compoundsmetal-insulator transitionperturbation theory/ charge orderingFe 3O 4electronic long-range orderband termspinless fermion modelCoulomb interactionsperturbation theoryThe stability of the electronic long-range order in Fe 3O 4 with respect to the band term is investigated using a spinless ...
Phase transitions that occur in materials, driven, for instance, by changes in temperature or pressure, can dramatically change the materials’ properties. Discovering new types of transitions and understanding their mechanisms is important not only from
Magneto-optical transitions inCoFe2O4andNiFe2O4spinel ferrites are investigated in comparison with those in isostructuralFe3O4.The Kerr angle and ellipticity of the ferrites have been measured by magneto-optic Kerr effect (MOKE) spectroscopy in the 1.5–5 eV region. The results indicate that thed...
Charge order with integer iron valence in Fe2OBO3 . Phys. Rev. Lett. 99, 086403 (2007) Article ADS CAS Google Scholar Shim, J. H. & Lee, S. Coexistence of two different Cr ions by self-doping in half-metallic CrO2 nanorods. Phys. Rev. Lett. 99, 057209 (2007) Article ADS ...
The oxide film of steels in air can take the form of three basic iron oxides, FeO, Fe2O3, and Fe3O4 [29], [30] and exhibits a layered structure. The uppermost layer is Fe2O3, while beneath this lie layers of Fe3O4 and finally FeO next to the metal itself [31]. The Fe2O...
1. INTRODUCTION Most iron oxide and oxyhydroxide minerals are highly reactive in the environment (e.g. Poulton et al., 2004) and play a major role in toxic metal and contaminant remedia- tion (e.g. Waychunas et al., 2005). Amongst these minerals, green rusts have recently been the ...
Charge density of the metal/oxide interface is obtained from DFT calculations, as well as for the free surfaces involved. A homemade computer program was implemented to calculate charge redistribution between the constituting surfaces and iron / magnetite interfaces. This analysis makes it possible to...
Iron in the slag and charge samples is present as Fe3O4, and Mn mostly occurs as Mn(III). The oxidation state of V in the slag and charge can be determined by the intensity ratio of the K and L lines of the XRF spectra; however, this method is not recommended because of its low...
The advantages of using iron (tungsten)-base oxide as solid powder catalysts in the heterogeneous photo-Fenton-like process are the following: (i) The reaction can be carried out in almost neutral conditions; (ii) The transformation of Fe3+/Fe2+ and W6+/W5+are beneficial to the generation...
Predicted Magnetoelectric Effect in Fe/ BaTiO3 Multilayers: Ferroelectric Control of Magnetism. Phys. Rev. Lett. 97, 047201 (2006). 27. Maruyama, T. et al. Large voltage-induced magnetic anisotropy change in a few atomic layers of iron. Nat. Nanotech. 4, 158–161 (2009). 28. Weisheit,...