Magnetic properties of nanocrystalline Co1−xZnxFe2O4 prepared by forced hydrolysis method

Composition dependence of the coercivity in magnetic nanoparticles suitable for magnetic hyperthermia

“…It is observed that the Curie temperature in Co-Zn ferrite nanoparticles also decreases with increasing of Zn content (Fig. 3, curve 2), and for 77% x = it is 315 K. The obtained results are in accordance with the experimenatal data for Co-Zn ferrite nanoparticles [10,35,36]. In conclusion, we have shown that spherical Co 1-x Zn x Fe 2 O 4 nanoparticles with 77% x = are suitable for magnetic hyperthermia.…”

“…Increasing of Zn-concentration in Co-Zn and Mn-Zn ferrite nanoparticles leads to smaller C T and c H values [10]. Duong et al [35,36] have observed that by substituting cobalt by zinc in Co-ferrite powders the magnetization increases, but the coercivity and the anisotropy constant decrease with increasing substitution level. Co ferrite is an oxide with a spinel structure and exhibits a reasonable saturation magnetization s M and a very high cubic magnetocrystalline anisotropy, i.e.…”

Dielectric properties of nanocrystalline Co-Mg ferrites

“…They have good magnetic and electrical properties like high magnetic permeability, high electrical resistivity, negligible eddy current losses and low dielectric and magnetic losses [1][2][3][4]. To synthesize the nano ferrites, several routes have been reported like coprecipitation [5], microwave [6], sol-gel [7] and hydrolysis [8]. Cobalt ferrite nano particles have high electromagnetic performance, excellent chemical stability, mechanical hardness, high values of anisotropy and high coercive field [9].…”

Dextrin-coated zinc substituted cobalt-ferrite nanoparticles as an MRI contrast agent: In vitro and in vivo imaging studies

“…Two different types of zinc substituted/doped cobalt ferrite with formulas of Zn x Co 1-x Fe 2 O 4 [22][23][24][25][26][27][28][29][30][31][32][33][34] and CoZn x Fe 2-x O 4 [35] have been synthesized. For the synthesis of the former, the methods of microwave heating [22], solution combustion [23,24], thermal decomposition [25][26][27], solid-state reaction [28,29], sol-gel [30,31], forced hydrolysis [32], and co-precipitation [33,34] A c c e p t e d M a n u s c r i p t 5 synthesized by the aqueous co-precipitation method.…”

“…For the synthesis of the former, the methods of microwave heating [22], solution combustion [23,24], thermal decomposition [25][26][27], solid-state reaction [28,29], sol-gel [30,31], forced hydrolysis [32], and co-precipitation [33,34] A c c e p t e d M a n u s c r i p t 5 synthesized by the aqueous co-precipitation method. ZCFNPs were characterized by different physical and chemical methods, and relaxivities r 2 and r 2 * were measured with a clinical 1.5 T MRI scanner in vitro.…”