Lithium ferrite for gas sensing applications

Particle size distribution, magnetic permeability and dc conductivity of nano-structured and bulk LiNiZn–ferrite samples

“…Small crystallite size implies an increase of the insulating surface on the grain boundaries, which normally accounts for high electrical resistance of the polycrystalline material. The other aspect is that the porous structure of these samples impedes the motion of charge carriers leading to a decrease in the conductivity [22]. From Table 3, it can be seen that the values of the activation energy in the paramagnetic region are greater than those in the ferrimagnetic region for all samples under investigation.…”

Preparation and characterization of spinel-type MeFe2O4 (Me = Cu, Cd, Ni and Zn) for catalyst applications

“…In this work, the so called "selfcombustion method" [16,17] was applied to prepare nanostructured spinel ferrites. In this method, the thermal energy for synthesis reaction of the ferrite crystallites is provided by a fast exothermic combustion reaction and the final product is a finely divided powder.…”

Effect of Composition on Structural and Magnetic Properties of Nanocrystalline Ferrite Li0.5Sm x Fe2.5–x O4

“…Small amounts of rare earth elements (REE), such as Sm, can significantly affect the magnetic properties and magnetic coercivity of Li-ferrites, making them suitable for a variety of applications especially concerning the gas sensor and hyperthermia treatment [4][5][6][7]. A number of scientists studied the effect of various REE doping atoms on the properties of Ni-Co, Cd-Mg, Li-Mg, Ni-Zn, and etc.…”