Investigation of Cation Distribution and Microstructure of Nano Ferrites Prepared by Different Wet Methods

Abstract

Nanostructure ferrite of composition Ni 0.5 Zn 0.5 Cr 0.1 Fe 1.9 O 4 was prepared by sol-gel, co-precipitation, citrate-gel, flash and oxalate precursor methods. Structural and micro structural analysis of the investigated samples were carried out by X-rays diffractometer (XRD), infrared spectroscopy, transmission electron microscopy (TEM) and atomic force microscope. It was observed that the lattice parameter of cubic spinel was constant, and the positions of both tetrahedral and the octahedral bands had the fixed positions for all methods except flash and oxalate precursor methods. These results were explained on the basis of theoretical calculation of cation distribution for Ni-Zn-Cr ferrite. The average crystalline sizes of the investigated samples deduced by TEM were in good agreement with the one estimated by XRD. The above results were correlated to the results of magnetic measurements of the investigated samples.

Synthesis and Optical Characterization of Novel Chemically-Deposited AgCrO2 Thin Films at Low Temperature

“…The measured particle size from the TEM micrograph was found to be 25, 32 and, 38 nm for the films prepared at 3, 6 and, 8 h, respectively. [29][30][31][32] These results are reliable compared to those obtained from XRD data. The disagreements between the two values can be attributed to the difference in the used techniques.…”