Investigation of the structural, optical, elastic and electrical properties of spinel LiZn₂Fe₃O₈ nanoparticles annealed at two distinct temperatures

Abstract

Nanoparticles of Li0.5ZnFe1.5O4 (LiZn2Fe3O8) with the spinel structure were prepared by a sol–gel auto-combustion method at two different annealing temperatures.

Magnetic and spectroscopic properties of Ni–Zn–Al ferrite spinel: from the nanoscale to microscale

“…The value transverse wave velocity (n s ), longitudinal wave velocity (n l ), mean elastic wave velocity (n m ), Young's modulus (E), rigidity modulus (G), Poisson's ratio (s), and Debye temperature (q E ) of the present system were calculated using the standard formulas available in the literature. 12,13 The calculated values of elastic parameters for all the compositions (Table S4 †) are in good agreement to those obtained from ultrasonic pulses transmission (UPT) technique. 50 The values of elastic properties increase with the increase of annealing temperature, which indicates that the size of particles has large impact on elastic properties of spinel ferrite.…”

“…It is well known from past reports on ferrite spinel that, the absorption can be attributed to the photo-excitation of electrons from the valence band to the conduction band (ligand-to-metal (p-d) type charge transition O 2p / Fe 3d ) or to the 3d 5 -3d 4 4s 1 transition in Fe 3+ ions. 12 Interestingly, a slightly redshi in the absorption edge was observed as the size of grain increases. This might be due to changes in their morphologies, particle size, carrier concentrations, surface microstructures, presence of very small amount of impurities, lattice strain and oxygen vacancy.…”

“…Therefore, a high surface area of ferrite is needed for sensing and supercapacitor application. 12 The crystallite size was calculated from the line broadening of the most intense (311) peak using the classical Scherer formula: 12,21 where D sc is crystalline size, K is shape factor (0.9), l is wavelength of Cu Ka radiation (1.5406 A), q the diffraction Bragg angle of the most intense peak (311) and b is half width of (311) peak in radian. It is clear that from Fig.…”

“…The relation between structures and physical properties for nano ferrites requires a careful consideration. Therefore, various methods, including, forced hydrolysis in polyol, ball milling, coprecipitation, sol-gel auto-combustion and hydrothermal/solvothermal method etc., 3,[11][12][13][14] have extensively been developed to synthesize nano-spinel ferrite with different sizes and shapes. Ball milling method is favorable to produce a highly crystalline nanostructure, but always leads to agglomeration in high reaction temperature and long time.…”

Effect of Bi-substitution into the A-site of multiferroic La0.8Ca0.2FeO3on structural, electrical and dielectric properties

“…The Z 0 behaviour of our compounds at low and high frequencies is in perfect agreement with the results reported in the literature. 42 In the intermediate frequency region, a gradual decrease in Z 0 with increasing frequency and temperature was observed for all compounds which is a sign of the great charge carriers mobility, indicating a reinforcement of the electrical conductivity by increasing the temperature and the frequency. 43 We also note that for the compounds with x > 0.10, and in the region of the intermediate frequencies, Z 0 presents a small plateau, then decreases thereaer until the fusion towards the high frequencies.…”