Monodispersed nanocrystalline Co1–xZnxFe2O4 particles by forced hydrolysis: Synthesis and characterization

Magnetic Properties of Co0.5Zn0.5Fe2O4Nanoparticles Synthesized by a Template-Assisted Hydrothermal Method

“…This characteristic was also reported for the Co 0.5 Zn 0.5 Fe 2 O 4 nanospheres prepared via the solvothermal method, and the saturation magnetization of the nanoparticles was close to that observed for the nanospheres at an applied field of 5 kOe (64.6 emu·g −1 ) [18]. The saturation magnetization of these samples was smaller than that observed for the bulk material though (∼80 emu·g −1 ) [12,14]. These differences in the magnetization value (such as saturation magnetization, remanent magnetization, and coercivity) between the nanosized ferrites and bulk ferrites can be attributed to the finite size effect [19].…”

“…To date, many methods have been developed to prepare Co 1-x Zn x Fe 2 O 4 nanopowders, such as the coprecipitation method [6,8,10], the standard solid-state reaction technique [7,11], the forced hydrolysis method [12], the microwavehydrothermal method [13], and the hydrothermal method [14]. However, research on the template-assisted synthesis of Co 1-x Zn x Fe 2 O 4 nanoparticles is comparatively limited.…”

Effect of Zn Substitution on the Magnetic Properties of Cobalt Ferrite Nano Particles Prepared Via Sol-Gel Route

“…Vaidyanathan et al [8] also reported decrease in magnetic properties such as M s , H s , H c , and M r with increase in zinc substitution. Single phase and monodispersed nanocrystalline Zn-substituted Cobalt ferrites with grain size of 3 nm were prepared by Duong et al [9] using forced hydrolysis method and found that the ferrites were super paramagnetic at room temperature and ferrimagnetic at lower temperatures. Recently Waje et al [10] reported that Co 0.5 Zn 0.5 Fe 2 O 4 nanoparticles, prepared by mechanical alloying and sintering show a constant value of permittivity within a measured frequency range but vary with sintering temperature.…”

ZnFe2O4 Containing Nanoparticles: Synthesis and Magnetic Properties

“…In recent times ferrite materials are used to avoid and remove radio frequency disturbances in audio systems [4], as polarized ferroelectric ceramic in acoustic elements of underwater sound transducers [15] and microwave absorbing materials [16], including ferrite containing radar absorbing colours for disguising military aircraft [17]. Various fabrication methods to prepare spinel ferrites nanocrystals have been reported, for example, the standard high temperature solid-state reaction technique [18], chemical co-precipitation method [19], sol-gel method [20], combustion reaction synthesis [21], hydrolysis [22], hydrothermal synthesis [23], salt melt technique [6], pyrolysis, different microwave synthesis methods [24], including microwave refluxing [25], microwave plasma [26] and the microwave-hydrothermal method [27], high energy ball milling technique [28], microemulsion method [29], sonochemical reaction [30], vapour deposition [31], precursor techniques [32], and plasma synthesis [33]. In our previous investigations [34], [35] we have studied synthesis of Ni and Co ferrite nanoparticles by the sol-gel selfpropagating combustion method and their magnetic properties.…”