Tuning of physical properties of multifunctional Mg-Zn spinel ferrite nanocrystals: a comparative investigations manufactured via conventional ceramic versus green approach sol-gel combustion route

Abstract

This work focused on the impact of synthesis routes on the structural, microstructural, magnetic, electrical and dielectric characteristics of Mg1−x Zn x Fe2O4 (x = 0.00, 0.25, 0.50, 0.75, and 1.00) nanocrystals manufactured via the ceramic and green approach sol–gel route. The powder X-ray diffraction (XRD) analysis reveals that the entire synthesized ferrite solids crystallize in single phase spinel structure. The XRD outcomes highlight the impact of the synthesis routes and Zn2+ replacement on the morphology, crystallite size and structural parameters of magnesium nano-ferrites. The transmission electron microscopy (TEM) images illustrate that the process of synthesis causes extensive lessening of grain and crystallite sizes. The magnetic study reveals that the magnetic properties of magnesium ferrite can be tuned by zinc substitution. The saturation magnetization (Ms), retentivity (Mr), coercive force (Hc) and magneton number diminutions meaningfully with the replacement of diamagnetic Zn2+ ions in Mg-ferrite for both the synthesized systems. The deterioration of magnetic parameters with Zn2+ substitution can be clarified on the base of the random spin canting model. Likewise, the magnetic parameters, enhanced meaningfully for sol-gel derived samples this can be attributed due to decline of crystallite size effect. The DC electric resistivity displays NTCR behaviour like ideal semiconducting materials for all the produced samples. The DC resistivity values of sol-gel produced samples were found to be little bit higher than that of ceramic derived samples. The experimental dielectric constant as a function of frequency behaviour can be elucidated with the support of the heterogeneous model of the polycrystalline structure of ferrites. The dielectric constant and loss tangent decreases with Zn2+ content for both the systems. The dielectric constant enhances for sol-gel derived samples; however, lower values of loss tangent were found. The obtained outcomes can be suitable for multifunctional applications in electronics devices and biomedical field.

Surface Functionalized Superparamagnetic Zn‐Mg Ferrite Nanoparticles for Magnetic Hyperthermia Application Towards Noninvasive Cancer Treatment

“…It is noted from Figure 1 that, surface‐modified Zn 0.25 Mg 0.75 Fe 2 O 4 nanoferrites possess Bragg's planes analogous to the face centered spinel cubic structure belonging to the Fd − 3 m ( Oh 7 ) space group. All the planes are well matched with that are reported in the literature [ 18 ] and JCPDS Card No. #88‐1935).…”

Exploration through Structural, Electrical, and Magnetic Properties of Al3+ Doped Ni–Zn–Co Nanospinel Ferrites

“…6,10 Recently, with the growth of nanoscience and nanotechnology, the nanospinel ferrites have gained much consideration because of their extraordinarily diverse properties than their bulk mates. 3,11 Several ferrimagnetic materials have prime market share and manufacturing kits because of their response with ac magnetic fields until 1 MHz. 12 However, Ni−Zn cubic ferrites are candidates for high-frequency operating devices like power electronics, telecommunications, inductors, and transformer core.…”

Fabrication of magnetic ZnO/ZnFe2O4/diatomite composites: improved photocatalytic efficiency under visible light irradiation

“…In the family of magnetic nanomaterials, spinel ferrite nanomaterials are characterized by their high electrical resistivity, high saturation magnetization, low eddy current, good physical chemistry properties, and low cost [ 25 , 26 ], which is widely used in memories storage, a drug targeted delivery, magnetic hyperthermia, magnetic resonance imaging, photocatalysis and other fields [ 27 – 30 ]. The general formula of Spinel ferrite material is MFe 2 O 4 , where M is Co 2+ , Ni 2+ , Mn 2+ , Zn 2+ and other divalent metal ions, which are in tetrahedral position, while trivalent Fe ions are in octahedral place.…”