Fe Impurities Weaken the Ferromagnetic Behavior in Au Nanoparticles

Removal of Methyl Orange from Aqueous Solutions by Ferromagnetic Fe/Ni Nanoparticles

Herein, the removal of methyl orange (MO), a monoazo dye, from aqueous solutions was investigated using bimetallic ferromagnetic Fe/Ni nanoparticles (NPs) with the average particle size of 12-16 nm. The effect of contact time, pH, temperature, and Fe/Ni dosage on dye removal process was investigated. The results showed that 60 mg of Fe/Ni NPs at 25 oC and pH= 1 can remove 99.5% of 50 mg/L dye s...

Tuning the electronic behavior of Au nanoparticles with capping molecules

Singular effects of impurities near the ferromagnetic quantum-critical point.

Systematic theoretical results for the effects of a dilute concentration of magnetic impurities on the thermodynamic and transport properties in the region around the quantum critical point of a ferromagnetic transition are obtained. In the quasiclassical regime, the dynamical spin fluctuations enhance the Kondo temperature. This energy scale decreases rapidly in the quantum fluctuation regime,...

Electronic structure of 3d impurities in ferromagnetic iron

2014 We present the results of the calculation of the electronic structure of impurities (Ti, V, Cr, Mn, Co, Ni, Cu) diluted in ferromagnetic iron obtained by the method of linear combination of « muffin-tin » orbitals in the atomic sphere approximation (LMTO-ASA). The local moments and the hyperfine fields on the impurity and the electronic specific heat coefficient charges are compared with t...

Autonomous Repair Mechanism of Creep Damage in Fe-Au and Fe-Au-B-N Alloys

The autonomous repair mechanism of creep cavitation during high-temperature deformation has been investigated in Fe-Au and Fe-Au-B-N alloys. Combined electron-microscopy techniques and atom probe tomography reveal how the improved creep properties result from Au precipitation within the creep cavities, preferentially formed on grain boundaries oriented perpendicular to the applied stress. The s...