Effect of Chemical Reaction Temperature on Magnetic Properties of Cu²⁺ Substituted NiZn Ferrites

Abstract

Ni-Cu-Zn ferrites with general formula Ni0.5Cux/2Zn0.5-x/2Fe2O4 (with x = 0.3, 0.4, 0.5 and 0.6) have been synthesized using oxalate precursor method with different precursor reaction temperatures in the range 100C to 700C. The structural analysis has been carried out using X-ray diffraction studies which reveal the formation of ferrites structure. The lattice parameters obtained using the most intense 311 peak are found to be in the range 8.37 to 8.42 Å for all the samples. The saturation magnetization is found to be in the range 20 to 51 emu/g, while the magnetic moment is found to be in the range 0.63 to 1.5 µB. The magnetic losses were found to be maximum for the samples obtained at precursor reaction temperature of 350C. The grain size is found to be in the range 0.4 to 2.0 µm. There is variation in the magnetic properties for different precursor temperatures indicating the effect of reaction history on the various parameters studied.

Dielectric, magnetic and microwave absorbing properties of polypyrrol-Co0·7Cu0·1Zn0·2Fe2O4 nanocomposites

“…15 A number of researches have been reported on studying the synthesis, structure and electromagnetic properties of spinel ferrites in recent years. 6,[16][17][18] Polypyrrol-ferrites nanocomposites which combine different functions and characteristics of individual materials are a new organic-inorganic hybrid material and correspond with the 'ideal' microwave absorbing material, which owns such advantages as strong absorption, wide frequency band, small specific gravity, thin thickness, considerable electrical loss and good magnetic loss. 1,6,19,20 Xie et al 19 …”