Synthesis, characterization and FC–ZFC magnetization studies of cobalt substituted lithium nano ferrites

Biodiesel synthesis using a novel monolithic catalyst with magnetic properties (K2CO3/γ-Al2O3/Sepiolite/γ-Fe2O3) by ethanolic route

“…The magnetization versus field curves show saturation at high fields and lack any hysteretic behavior at low fields, with absence of any detectable remanent magnetization. This superparamagnetic behavior in the range of temperatures of interest, was corroborated by Zero Field Cooled (ZFC) and Field Cooled (FC) magnetization measurements [30]. Attention should be paid to the observation that in the M vs H curves the magnetization decreases by 5.6 times, i.e., from 32.57 to 5.73 emu/ g during catalyst preparation respect to the value for pure magnetic particles.…”

Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous succinate precursor and study of solid-state properties of its nanosized thermal product, Ni0.5Co0.5Fe2O4

“…As the temperature is reduced, the thermal fluctuations decrease and the spins orient to reduce the canting angle and are aligned to a ferromagnetic structure. The ZFC-FC magnetization show Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous… 813 thermo-magnetic irreversibility that is divergence between the M FC and the M ZFC magnetization curves [61]. The M ZFC and the M FC curves show bifurcation over the whole temperature range, which indicates that the system is not magnetically homogenous although the material is chemically homogenous [64,65].…”

“…The strong magnetocrystalline anisotropy of cobalt ferrites is mainly due to the presence of Co 2? ions in the octahedral sites of the spinel structure [61]. When the temperature increases, Co 2?…”

Dielectric Properties of Nano Crystalline Cobalt Substituted Lithium Ferrites by Citrate-gel Auto Combustion Method

“…The detailed synthesis process of Cobalt substituted Lithium nano crystalline ferrites by citrate gel auto combustion method were explained in our earlier publication [12]. The synthesized powders were sintered at 500 o C for four hours.…”