Microstructural and Mössbauer Spectroscopy Studies ofMg1-x ZnxFe2

Abstract

Zinc substituted magnesium ferriteMg1-xZnxFe2O4(x=0.5,0.7)powders have been prepared by a sol-gel autocombustion method. XRD patterns show that the specimens withx=0.5and 0.7 exhibit single-phase spinel structure, and more content of Zn in specimens is favorable for the synthesis of pure Mg-Zn ferrites. Room temperature Mössbauer spectra ofMg1-xZnxFe2O4annealed at 800°C display transition from ferrimagnetic behavior to super paramagnetic behavior with increase in zinc concentration. The Mössbauer spectras of Mg0.5Zn0.5Fe2O4annealed at different temperatures display the magnetic phase change of the ferrite particles.

Magnetic and Mössbauer Spectroscopy Studies of Zinc-Substituted Cobalt Ferrites Prepared by the Sol-Gel Method

“…From our earlier research [32], the average particle size of CoFe 2 O 4 ( x = 0) is between 85.3 and 102.4 nm, and with increasing Zn content the particle size increases [23,33,34]. The sample’s magneto-crystalline anisotropy decreases with increasing Zn 2+ ions substituted for Co 2+ ions, with subsequent decreases in the coercivity [35,36]. Kamali et al synthesized NiFe 2-x Al x O 4 ferrites and observed the complicated cation distributions in this ferrite system as a function of x .…”

Mössbauer Spectroscopy, Structural and Magnetic Studies of Zn2+ Substituted Magnesium Ferrite Nanomaterials Prepared by Sol‐Gel Method

“…So replacing Mg 2+ ions with the Zn 2+ ions will not have much effect on the magnetic anisotropy constant. The reduction in magnetic coercivity is related to the grain size [28][29][30]. display that the A Mössbauer absorption area decreases and the B Mössbauer absorption area increases with increasing zinc concentration.…”

Microstructure and Magnetic Studies of La1-xSrxFeO3 Nano Particles Fabricated by the Citrate Sol-Gel Method

“…8 and Table 3 indicates that magnetization increases with increasing Sr 2+ ion concentration. This may be due to the fact that increase in concentration may cause the Sr 2+ ions to replace La 3+ ions [33,34]. In such condition, Fe 4+ ions are formed to balance the overall electrical charge of the particles, which in turn enhances the ferromagnetic interaction between Fe 3+ and Fe 4+ ions [5,35].…”