Iron(II,III) oxide is the chemical compound with formula Fe 3 O 4.It occurs in nature as the mineral magnetite.It is one of a number of iron oxides, the others being iron(II) oxide (FeO), which is rare, and iron(III) oxide (Fe 2 O 3) which also occurs naturally as the mineral hematite.It contains both Fe 2+ and Fe 3+ ions and is sometimes formulated as FeO ∙ Fe 2 O 3.

We synthesized Ca 1−x Sr x FeO 3 containing tetravalent iron Fe 4+ with high valence by low temperature heat treatment along with ozone oxidization. We investigated the magnetic properties of perovskite Ca 1−x Sr x FeO 3.The charge disproportionation transition temperature (T CD) of Ca 1−x Sr x FeO 3 was observed from x = 0.0 to 0.6 in the magnetic susceptibility measurements.

Ultrathin FeO(001) films were grown via molecular beam epitaxy on MgO(001) using reactive deposition of Fe. The growth conditions were adjusted toward stabilization of the wüstite phase, the existence of which was confirmed by means of conversion electron Möss spectroscopy. It …

The magnetic properties of the transition metal oxide FeO greatly effect its equation of state and elasticity, and thus have been of great interest. But FeO is not treated well by density functional theory which makes it a metal, instead of an insulator at low pressures. Employing the newly developed method of the density functional theory plus dynamical mean field theory, the magnetic ...

Möss spectra of α-Fe 2 O 3 films could be analyzed by two magnetic components, one very close to bulk α-Fe 2 O 3 and the other one identified as surface α-Fe 2 O 3. Möss spectra of FeO films showed that the samples were off-stoichiometric, with about 10% Fe deficiency.

For example, there exists FeO interfaces in all kinds of Fe-based magnetic tunnel junction devices, which has important influence on the magnetic interlayer coupling and spin transport scattering. ...

The geometrical structure of ferromagnetic FeO is optimized. Its electric and magnetic properties such as the half-metallicity, the conductivity and the magnetic moment distribution are investigated by performing first-principles calculations within the generalized gradient approximation for the exchange-correlation function based on density functional theory.

Lak, A. et al. Size dependent structural and magnetic properties of FeO–Fe3O4 nanoparticles. Nanoscale 5, 12286–12295 (2013). ADS CAS PubMed Google Scholar

Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe 2 O 3.It is one of the three main oxides of iron, the other two being iron(II) oxide (FeO), which is rare; and iron(II,III) oxide (Fe 3 O 4), which also occurs naturally as the mineral magnetite.As the mineral known as hematite, Fe 2 O 3 is the main source of iron for the steel industry.

The hard-magnetic FeO x (6 nm)/FePt film was coupled with single switching field. The FeO x /(disordered FePt) layer structure was observed with further annealing at 800°C and presented soft-magnetic loop. In summary, the coupling between soft-magnetic Fe, FeO x layer, and hard-magnetic L1 0 FePt layer can be controlled by the oxygen diffusion ...

The antiferromagnetic arrangement of moments in MnO, FeO, CoO, and NiO have been investigated by powder neutron diffraction. The results for the four oxides are consistent with a structure in which the magnetic moments are arrayed in ferromagnetic sheets parallel to (111) planes, and the direction of magnetization in neighboring planes is antiparallel.

Synthesis of FeO/ZnO@PANI Nano-photocatalyst (FZP) FeO/ZnO magnetic metal oxides (FZ MMO) were synthesized by the reduction process. In a typical process, 35 mM ferric chloride solution was properly mixed with a 19 mM zinc nitrate solution in …

Herein, by studying a stepwise phase transformation of 23 nm FeO-Fe 3 O 4 core-shell nanocubes into Fe 3 O 4, we identify a composition at which the magnetic heating performance of the nanocubes is not affected by the medium viscosity and aggregation.Structural and magnetic characterizations reveal the transformation of the FeO-Fe 3 O 4 nanocubes from having stoichiometric phase compositions ...

Iron Oxide Powders TSCA (SARA Title III) Status: Varies. For further information please call the E.P.A. at +1.202-554-1404. Iron Oxide Powders CAS Numbers: a) CAS# (FeO) b) CAS# (Fe2O3) c) CAS# (Fe3O4) d) CAS# (FeO * OH) and 5 (Fe203 * H20)

The net magnetic moment aligned against the applied magnetic field if the field is not strong enough, while it is oriented along the applied direction at high magnetic field. Conclusion In conclusion, the Co-doped Bi 5 Ti 3 FeO 15 ( x = 0, 0.4 ~ 0.6) ceramics exhibit magnetization reversal at low applied fields.

The magnetic properties of monodisperse FeO-Fe 3 O 4 nanoparticles with different mean sizes and volume fractions of FeO synthesized via decomposition of iron oleate were correlated to their crystallographic and phase compositional features by exploiting high resolution transmission electron microscopy, X-ray diffraction, Möss spectroscopy and field and zero field cooled magnetization ...

TGA is conducted on the pure epoxy and Fe@FeO/epoxy nanocomposites from 25 to 800 °C with a nitrogen flow rate of 60 mL/min and a heating rate of 10 °C/min. Magnetic Property. The magnetic properties of the nano-composites at room temperature are carried out ina9T physical properties measurement system (PPMS) by Quantum Design. Electrical ...

Fluorine does not act in the cold on ferrous oxide, but with gentle heat a reaction sets in with incandescence. When ferrous oxide, prepared at 300 °C, is heated in sulfur dioxide, the mass becomes incandescent. Easily oxidized by air. It is a strong base and readily absorbed / carbon dioxide /. O…

However, the evidence of pure α-Fe nanocrystal coated with oxide layer is also revealed by HR-TEM images and SAED patterns in these Fe(O) particles. Möss spectra and hyperfine magnetic fields at room temperature for the assemblies of Fe(C) and Fe(O) nanoparticles further confirm their distinct nanophases that detected by XRD analysis and ...

Answer: Electronic configuration of Fe is 3d6 4s2. With oxygen, Fe combines in a +2 state. +2 means that you have to remove 2 electrons, and we'll remove these from 4s orbital. This leaves us with 3d6 4s0. Now, we focus on 3d orbital: d orbital can hold 10 electrons, when you pair 5 electrons w...

The major features of the magnetic structure in the Fe/FeO superlattice were revealed using the NFS technique on the metal-doped sample. A small magnetic field of 20 mT is applied parallel to the film surface and perpendicular to the scattering plane to define the magnetization direction.

Magnetic polyacrylonitrile-Fe@FeO nanocomposite fibers - Electrospinning, stabilization and carbonization Jiahua Zhua, Suying Weib, Dan Rutmana, Neel Haldolaarachchigec, David P. Youngc, Zhanhu Guoa,* aIntegrated Composites Laboratory (ICL), Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, TX 77710, USA b Department of Chemistry and …

The calculated spin, orbital, and total magnetic moments in table 1 obtained within LDA + U agree well with the results from the LDA + U calculations of Tran et al . Unfortunately, for FeO the values of the total magnetic moment are less well known from measurements. They range from 3.3 to 4.6 μ B [1, 6, 7] and, hence, are not conclusive.

The magnetic properties of monodisperse FeO–Fe 3 O 4 nanoparticles with different mean sizes and volume fractions of FeO synthesized via decomposition of iron oleate were correlated to their crystallographic and phase compositional features by exploiting high resolution transmission electron microscopy, X-ray diffraction, Möss spectroscopy and field and zero field cooled magnetization ...

Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite. One of several iron oxides, it is a black-colored powder that is sometimes confused with rust, the latter of which consists of hydrated iron(III) oxide (ferric oxide). Iron(II) oxide also refers to a family of related non-stoichiometric compounds, which are typically iron ...

Figure 8 presents the tangents of magnetic and dielectric loss in raw CIPs, CIPs@Fe 2 O 3 and CIPs@FeO@C composites. In Fig. 8 a, it exhibits that the tangent of dielectric loss in raw CIPs increases firstly and then decreases as the frequency increased, there is a peak value of 0.11 at 2.49 GHz, suggesting a weak dielectric loss ability of ...

For probing the magnetic sequence, the FeO supercell with the NaCl structure containing four Feions and four - O-ions was selected and shown in ure 1(a), where these ions were signed by the corresponFig ding element symbols. The space group was Fm3-m. The initial magnetic moment configurations of Fe-ions were set as (1) One up and three down ...

Results: magnetic moment vs. volume Magnetic moments of FeO decrease as volume is decreased. The M vs. V lines start to converge as temperature is lower than 1000 K; indicate the collapse of magnetic moments is a crossover. The collapse of magnetic moments, or the HS-LS crossover is consistent with previous DFT calculations.

12%Abstract The magnetic stability and electronic properties of the FeO compound are investigated using the framework of an all-electron full-potential linearized augmented-plane wave (FP-LAPW) method within the generalized gradient (GGA) and GGA+U approximations. We locate the ground state to be of rhombohedrally distorted B1 structure with compression along [111] …

Santillán et al. synthesized FeO x (Fe 3 O 4, γ-Fe 2 O 3 or α-Fe) by fs laser (120 fs, 1 kHz, 800 nm) ablation of Fe in water, by which M s, number density, magnetic radius and total radius of 49.3 emu/g, 2.9 × 10 18, 1.1 nm, 1.9 nm, respectively, were obtained, which were different from the magnetic properties (26.7 emu/g, 3468 μ B and 0 ...

In-situ synthesis of magnetic (NiFe 2O 4/CuO/FeO) nanocomposites. Journal of Solid State Chemistry, 2010. Manish Srivastava. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper.

Magnetic iron oxide (Fe 3 O 4) nanocrystals from NN-Labs take advantage of the strong magnetic properties of iron oxide and incorporate them into nano-scale materials. Our iron oxide nanoparticles demonstrate excellent size distribution, which allows for their use in high-level applications where strict control over the nanocrystals' properties and characteristics is necessary.

Magnetic moment of the Fe2+ ion in FeO, FeS and FeBr2 has been calculated within the quantum atomistic solid-state theory to substantially exceed a value of 4 muB in the magnetically-ordered state ...

The antiferromagnetic arrangement of moments in MnO, FeO, CoO, and NiO have been investigated by powder neutron diffraction. The results for the four oxides are consistent with a structure in which the magnetic moments are arrayed in ferromagnetic sheets parallel to (111) planes, and the direction of magnetization in neighboring planes is antiparallel.

However, it was found out that the composition of the core–shell structure and it was found that it is presence of FeO yields magnetic properties not seen in the absence made of 66.8% of CoFe2O4 and 32% of a solid solution of FeCo–FeO. of it [11–14].