Abstract
The finely controlled nanostructured cubic spinel ferrites pave the way to synthesize nanomaterials with specific properties for particular applications. In this paper, we report sol-gel synthesis of Zn doped spinel Co1-xZnxFe2O4 (where x= 0.0, 0.1, 0.2, and 0.3) ferrite nanoparticles. X-ray diffraction confirms the single phase cubic structure of nano ferrites with average particle size estimated between 55.38 to 32.87 nm and validated by Transmission electron microscopy (TEM) results (±1). The lattice parameter was found to increase with increasing Zn doping concentration. The samples exhibit normal dielectric behaviour of Maxwell-Wagner type of interfacial polarization that decreases with increasing frequency of the applied field. Temperature-dependent magnetic properties were investigated with the aid of physical property system. The hysteresis measurements of the samples show clearly enhancement in magnetic parameters as the temperature goes down to 20 K. Tuning of magnetic properties has been witnessed as a function of doping and temperature under the influence of externally applied magnetic field, has been discussed in this paper.
Highlights
Magnetic materials are of great interest since their discovery to the scientific community because of their interesting properties and applications in modern technology
Temperature-dependent magnetic properties were investigated with the aid of physical property system
Where the constant K is related to the crystalline shape and to both β full width at half maximum (FWHM) intensity measured in radians and , and λ is the wavelength of the X-ray (CuKα =0.154×10-10 nm) and θ is the Bragg’s angle in degrees
Summary
Magnetic materials are of great interest since their discovery to the scientific community because of their interesting properties and applications in modern technology. Ferrites are one of the important class of materials, which have attracted the interest of scientific community since last 5 decades due to their promising properties. When treated on nano-scale, they show different/tunable electrical and magnetic properties by chemical manipulation. These materials show very important applications in high-frequency devices (MHz to GHz), high-density perpendicular recording media devices and ferrofluids.. The interaction between two sub-lattices A and B, in a spinel system (AB2O4), consist of inter-sublattice (A-B) super-exchange interactions, intrasublattice (A-A), and (B-B) exchange interactions.
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