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Showing 1 to 20 of 21 for “"FeCo"”.
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Estabilidade térmica da coercividade e viscosidade magnética no nano compósito FeCo/MnO
… existente entre grãos nanometricos vizinhos de FeCo e MnO. A motivação para a continuidade no estudo magnético deste sistema foi a alta estabil- idade térmica da coercividade, apresentada no intervalo em temperatura desde ¡153oC até a temperatura ambiente. A primeira parte do nosso trabalho de …
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Influence of Mechanical Loading and Temperature on the Magnetic Properties of FeCo-2V Soft Magnetic Alloy
… into the mechanical and magnetic responses of FeCo-2V alloy under various loading and thermal conditions, aiming to elucidate the mechanisms behind magnetic property degradation during service. By integrating advanced characterisation techniques, including in situ Digital Image Correlation …
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Síntese in situ da liga de FeCo altamente estável encapsulada em carbono a partir do etanol
This research proposed to develop a FeCo magnetic alloy encapsulated in carbon, using ethanol as a carbon precursor, through the CVD route, for the photocatalytic degradation of organic contaminants. Initially, a CoxFeyO4 oxide in a 1:1 ratio was synthesized using the Pechini method. The material …
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Study on graphene-based nanocomposites with special magnetoresistance properties
… by integrating reduced graphene oxide (rGO) and FeCo nanoparticles (NPs). A facile solvothermal process was developed to produce FeCo/rGO hybrid nanosheets with significant MR (21 ± 6%) at the low magnetic field (10 kOe) and room temperature. In addition, we demonstrated that the wireless …
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Thermodynamics and Kinetics of Carbon Dioxide Corrosion of Mild Steel at Elevated Temperatures
… Fe2+, pH did not change with temperature due to FeCO<sub>3</sub> precipitation.</p><p>Pourbaix diagrams for the Fe-CO<sub>2</sub>-H<sub>2</sub>O systems were constructed using thermodynamic theory and data, subsequently validated with observed CO<sub>2</sub> corrosion phenomena. In the range of …
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Fabrication of Core-Shell Nanoparticles
… However, the copper shell (2.88 nm) around the FeCo alloy nanoparticle (0.87 nm) was fabricated and found to decrease the blocking temperature to 126 K. Complete displacement of Fe nanoparticle by copper ions was observed with a loss of the magnetic property. The electrochemical reaction rate …
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Metallocluster Site-Differentiation and Subsite Specific Heterometal Substitution
… heterometallic clusters [CoFe₃S₄(IMes)₃Cl]+ and [FeCo₃S₄(IMes)₃Cl]+. The reduced clusters, [M′M₃S₄(IMes)₃Cl], as well as the CO-bound clusters, [M′M₃S₄(IMes)₃(CO)], were also prepared, and a comparative analysis of the properties of all three series of clusters was undertaken. Low-valent …
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Multi-redox active polyanionic cathodes for alkali-ion batteries
… of Li₃MnCO₃PO₄ with the high cyclability of Li₃FeCO₃PO₄. Li₃Fe₀.₂Mn₀.₈CO₃PO₄ outperforms both Li₃MnCO₃PO₄ and Li₃FeCO₃PO₄, showing a reversible capacity of 105 mAh/g with little capacity fade over 25 cycles. However, poor thermodynamic stability of these compounds, particularly at partially …
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HIGH TEMPERATURE KINETICS OF PRECIPITATION AND DISSOLUTION OF FERROUS-CARBONATE
… in corrosion control and in the comparison of FeCO$\sb3$ to CaCO$\sb3$, a compound which has been studied extensively. The enthalpy of the dissolution reaction has been calculated to be $-22.8$ $\pm$ 0.6 kJ/mole, which is close to the NBS (1) reported value. The precipitation kinetics fit an …
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Brillouin scattering investigation of nanomagnetic structures
… into the magnetic interaction between FeCo nanowires in closely-packed arrays: conclusive evidence of collective spin waves arising from the dipolar coupling which is manifested as a reduction in spin wave frequency with decreasing interwire spacing is found, and (3) study of the spin …
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Aspects of group 14 element - transition metal cluster chemistry
… the products. The first reaction yielded [FeCo₃(CO)₁₂]⁻ (characterised by infrared spectroscopy and preliminary X-ray diffraction), Co₄(CO)₁₂ and Fe(CO)₅; and the latter reaction, [FeCo₃(CO)₁₂]⁻, Co₄(CO)₁₂ and the nitrido cluster, [NCo₆(CO)₁₅]⁻ ( characterised by infrared spectroscopy and …
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Kinetics of the release and precipitation of phosphorus in anaerobic digesters sequencing biological phosphorus removal systems
… by the competitive precipitation of siderite (FeCO₃ ). The extent to which the compounds are precipitated depends on the solids retention times, ionic strengths, size and amorphous nature of the precipitates and the substitution of foreign ions in the crystal lattice. The effective solubility …
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Building trustworthy machine learning systems in adversarial environments
… prediction and data-based evaluation; (3) FeCo which enhances the robustness of machine learning-based network intrusion detection systems by introducing a novel representation learning method; and (4) DP-FedMeta, which preserves data privacy and improves the privacy-accuracy trade-off in …
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Study of Magnetization Switching in Coupled Magnetic Nanostructured Systems
… and various magnetic anisotropies like: CrO2 , FeCo/IrMn and Co/SiO2 thin films. The TDO was subsequently used to explore the magnetization switching in coupled magnetic systems, like synthetic antiferromagnet (SAF) structures. Magnetoresistive random access memory (MRAM) is an important example …
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Exploiting the Spin Of Photons and Electrons in Light-Matter Interactions
… of magnetic order in ferrimag- netic alloy Gd(FeCo) using sub-picosecond laser pulses as the ultrafast stimuli. The instantaneous heating of the electron temperature due to light absorption triggers the energy and angular momentum exchange between the three thermo- dynamic reservoirs (electron, …
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New Developments in the Crystal Chemistry of Selected Borophosphates and Phosphates
… preparation of a borophosphate and a phosphate: FeCo(H2O)[BP3O9(OH)4], Fe1.3Co0.7[P2O7]∙2H2O The anionic partial structure of FeCo(H2O)[BP3O9(OH)4] is an open–branched tetramer built from (HO)BO3 sharing common O–corners with one (HO)PO3, one (HO)2PO2 and one PO4 group. The crystal structure is …
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Synthesis and Investigation of Nanomaterials by Homogeneous Nonaqueous Solution Phase Reactions
… such as Fe50Co50 alloy and Bi doped with Mn. For FeCo alloy, after annealing at 500 °C, a pure phase of Fe50Co50 was obtained. And we first synthesized the nanowires of bismuth doped with manganese. By studying intermediates at different temperatures during the growth process of nanowires, the …
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Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films
… nanoparticles of elements: Co, Fe, Ni), alloys: FeCo) and composites: CuCo), created by the laser dewetting process. By utilizing magnetic force microscopy technique, the magnetic anisotropy of individual nanoparticles was determined. The most important discovery was a size-dependent …
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Developing durable electrodes for selective electroreduction of CO2 to value-added intermediates
… amount of charge in shorter times lowers the FECO at different rates while increasing the electrolyte molarity leads to high amounts of carbonate deposits which quickly demote cathode performance. Ultimately, this dissertation presents data and results for moving ECO2RR towards feasibility at …
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