Abstract
The chemical formula Li0.5Fe2.5O4 of lithium ferrite prepared by two different chemical methods mentioned as low temperature solid state reaction (LTSSR) and modified combustion method (MCM). The samples showed nanoparticle scale with spinal structure. The magnetic analyses have done by the vibrating sample magnetometer VSM device, and both samples have the same magnetic properties represented by the magnetic saturation, remanence magnetization, and coercive magnetic field. The shape of hysteresis loop showed a soft ferrite and its area decreased with temperature increasing. On the other hand, the magnetic susceptibility decreased with increasing temperature for both samples of ferrite Li0.5Fe2.5O4 prepared. The sample of LTSSR exhibited a magnetic moment of about 0.410-3 JT-1 at applied magnetic field 50 kOe which is approaching the same for the sample prepared by MCM method.
Highlights
A ferrite has three phases, one of them is a cubic spinel structure with the general formula MO.Fe2O3 such as (M=Mn+2, Fe+2, Co+2, Ni+2, Cu+2, Zn+2, Mg+2), the second one is a hexagonal ferrite with the formula MO.6Fe2O3 (M=Ba+2, Ca+2, Sr+2), and the last one is a garnet formula 2M2O3.5Fe2O3, M is a cation of rare earth element with (+3) valence like Y [1]
The magnetic behavior of Li0.5Fe2.5O4 nanoparticles of ferrite-spinel structure had been studied in details
The hysteresis loop curve for two samples prepared by different method LTSTR, and modified combustion method (MCM) methods were obtained and show same behavior
Summary
Ferrite becomes one of the interested magnetic materials that applied in wide range of frequencies, its structure is a switching key to the electric, magnetic properties and supporting an important role in technological applications. It is belong to a soft ferrite material at a Curie temperature in a range (620°C) [3], a square hysteresis loop and high saturation magnetization. For this reason, it was designed for microwave devices and memory core applications. The different preparation methods used to prepare ferrite, such as low temperature solid state reaction (LTSSR) and modified combustion method (MCM). They supported many important parameters on magnetic properties [8, 9-12]. This paper dealing with the explanation more information about the effect of preparation methods and temperature on the behavior of LiFerrite nanoparticle
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