Effect of Ni Content on Structural and Magnetic Properties of Li-Ni Ferrites Nanostructure Prepared by Hydrothermal Method

Magnetic properties of Ba Ferrite Substituted by Low Fraction of Ni Cations

“…The degradation of Ms by Ni 2+ substitution can be explained by the preference of Ni 2+ ions for octahedral sites [Sadeq, 2019]. The redistribution of Fe 3+ ions from the octahedral sites to tetrahedral sites decreases the magnetic moment [Al-Shakarchi, 2016]. As Ni 2+ ions are magnetic, this replacement will reduce magnetization.…”

Effect of heat treatment on structural and magnetic properties of Li–Ni ferrite prepared via sol–gel auto-combustion method

“…The highest coercivity of 115 Oe is observed at the annealing temperature of 600 ℃ with the grain size of 35.6 nm. However, the coercivity gradually decreases with annealing temperature increasing from 600 ℃ to 850 ℃, indicating multidomain nature for the sample annealing above 600 ℃, which is decided by domain wall displacement [14]. The ratio R of the remanence to the saturation magnetization (Mr/Ms) listed in Table 5 is derived from the hysteresis loops.…”

“…However, the performance of nano-scale ferrites is also more sensitive to the effects of chemical composition, preparation methods, sintering temperature, and sintering time, etc [10,11]. There are multiple synthesis method to prepare the Li-Ni ferrite systems, such as hydrothermal, high temperature ceramic technique, co-precipitation, sol-gel etc [12][13][14][15][16]. In the above preparation methods, sol-gel auto-combustion method can prepare ultrafine crystalline powders exhibiting chemically homogeneous composition, uniform size and good reactivity.…”

Research on the physical properties of LiMn0.5Fe2O4 spinel ferrites by the combination of optical, magnetic, and dielectric behaviors

“…Several strategies and synthesis pathways are used for the formation of Li-based spinel ferrites, including solid-state reactions, co-precipitation, 26 hydrothermal, 27 microemulsion, 28 and sol–gel methods, 29 and the cation distribution and crystal structure change from one ferrite to another. All these factors prevent the materials from keeping the usual properties of a typical spinel ferrite structure 10 but different preparation processes and thermal treatment allow such difficulties to be overcome.…”