My seminars 2019-2020
College of Education-Physics Department
Cu1-xVxO Nanoparticles (where x = 0.00, 0.10, 0.20, and 0.30), were synthesized using the sol-gel method. The prepared powders were investigated using different characterization methods such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and a vibrating sample magnetometer (VSM). The XRD patterns of the synthesized samples clearly indicated a polycrystalline structure with a monoclinic phase. What is more, some diffraction peaks such as V2O3, V3O5, and VO2 appeared with increasing mixed vanadium. The nano-sized synthesized powders were identified by FE-SEM and revealed a semi-spherical morphology with some agglomeration. The VSM results indicated that the magnetic properties were dependent on the vanadium content. The saturation magnetization (Ms) increased monotonously from 0.2075 to 0.4836 emu/g as the vanadium content increased.
College of Education-Physics Department
Ferrite materials have become the subject of research interest in recent years. They have been used for innumerable applications and therefore can be considered as one of the most important materials [1]. The properties of these materials can be tuned easily due to the anioncation bond framework that connects the tetrahedral and octahedral sublattices with the structure capable of adopting a wide variety of ions at A and B sites. The magnetic and electronic properties could be strongly affected by alteration in cation distribution among tetrahedral and octahedral sites.
Among all ferrites, cobalt ferrite has aroused intense interests because of its chemical stability and large cubic magnetic anisotropy; it is also known to be a photo-magnetic material with high coercivity [2, 3]. Furthermore, it is been reported that nanoparticles are synthesized by a number of synthetic routes such as co-precipitation, microemulsion, thermal decomposition, hydrothermal synthesis and sonochemical synthesis [4]. Sol-gel method is the most conventional method employed to synthesize metal oxides. Hydrolysis, condensation, and drying process are the steps at which the starting materials undergo the synthesis of the metal oxide. Chlorides or metal oxides are used as a precursor for the formation of colloids solution where they go through three steps [5]. In this manuscript, we investigate the magnetic properties of MgFeCrO4 ferrite nanoparticles synthesized by the sol-gel auto combustion method.