The correlation between structure and magneto optical properties of nanostructured Magnesium ferrites upon Molybdenum doping for magnetic and optoelectronic applicability

Abstract

Nano-ferrite MgMoxFe2-xO4 (x= 0.0, 0.05, 0.15, and 0.3)were synthesized employing citrate sol-gel auto combustion methodology. X-ray diffraction (XRD) reveals the crystal structure of the prepared samples., XRD scrutiny disclosed a single cubic spinel phase for all specimens. Furthermore, the Rietveld analysis based on structure refinement used to determine the microstructural parameters and evaluate the cation distribution. The findings showed that the average crystallite size was ~39 nm, while the lattice constant “a” increases with increasing Mo concentrations attributable to introducing Mo+6 to supplant Fe+3. The magnetic properties were investigated utilizing VSM magnetometer. The saturation magnetization (Ms) descends with escalating Mo+6 replacement. Consequently, both Rietveld scrutiny and saturation magnetization (Ms) results suggest that the Mo+6 supplanted Fe+3 in octahedral B-locations. On the other hand, reflectance and transmittance were used in optical properties to calculate the refractive index, n, and the extinction coefficient, k. The parameters of optical properties such as infinity, lattice and relaxation time of dielectric constant were estimated. In addition, complex optical conductivity, optical electronegativity and optical transitions of all studied samples were assessed. Finally, the parameters of opto-electrical application, such as the concentration, mobility and resistivity of optical carrier were appraised.

Dielectric, conductivity properties, elastic moduli, and gamma-ray attenuation abilities: A wide-ranging investigation into Molybdenum added ferrite nanoparticles

“…2.1. Preparation and characterization of MgMo x Fe 2-x O 4 nanocrystalline ferrite MgMo x Fe 2-x O 4 nanocrystalline ferrite (where x = 0.0, 0.05, 0.1, 0.15, and 0.3) was synthesized following the routine in our early paper using the auto-combustion method [19][20][21]. The crystal and chemical structure of obtained samples were investigated using XRD (PANalytical) FTIR (PerkinElmer 887), respectively.…”

“…The findings indicate that the calculated crystallite size descends with an ascending Mo concentration ratio. The full crystal structure was investigated and reported in our early paper[19].…”

Investigations on structural and opto-electrical characterization of Ag-TCNQ (metal-organic frameworks) as complex thin films for potential device applications

“…The optical energy gap is classified into direct and indirect band gaps. To inspect the optical band gap (E g ), the edge of absorption was scrutinized to extract vital information about electronic inter-band transitions using Tauc's equation as following [30,31,33]: -…”

“…These parameters are important for the design of new materials in order to estimate the electronic state density and energy losses through passing the volume and surface of matter using fast-moving electrons. The complex optical dielectric constant, the optical conductivity, VELF, and SELF were estimated using the following relation [30,31,33]:- The free carrier concentration, N, the dielectric relaxation time, , t can be calculated by analyzing experimental data for the refractive index spectra below the interband absorption edge of the single effective oscillator model according to the following equations [30,31,33]: Nonlinear optics is a key topic of inquiry that has a vast range of applications, such as communication utilities. The third-order nonlinear optical susceptibility, , 3 c and the non-linear refractive index n 2 can be calculated using the following expressions [30]: where A 1 is constant, 1.7 × 10 -10 esu , and n 0 is the static refractive index of the thin films samples.…”

Multifunctional Ce+3 doped nickel-cobalt mixed ferrites via co-precipitation method for photocatalytic and antibacterial activity

“…Ferrite based nanomaterials have also found enormous applications as dilute magnetic semiconductors (DMS), commonly used in spintronics and data storage devices [18]. Metal ferrites can be easily magnetized at room temperature by external magnetic field and therefore can be evaluated by mixing and doping of various metal-based ferrites to be used in various magnetic materials applications [19,20]. These DMS NPs have excellent dielectric and electrical abilities with varying frequencies of applied electric field and temperature [21].…”