X-Ray and Infrared Studies for NiSiXFe2-xO4 Ferrites

A spinel ferrite of the system NiSixFe2-xO4 with (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) were studied via IR, Xray spectra and cation distribution. The X-ray pattern confirmed the spinel cubic structure of all Si contents. The lattice parameters estimated as a function of Si contents indicated a slight decrease of lattice parameter up to 0.2. The grain size increases with increasing Si content up to 0.3 and then decreases for higher Si content. The jump length of electrons decreased with Si concentration up to 0.2. Four absorption bands were observed in infrared spectra in the range between 1000 and 200 cm. These bands are assigned to Fe and Si at the Aand B-sites. The two high frequency bands in the range 580-555 and 450-400 cm is assigned to υ1 tetrahedral (A-site) and υ 2 octahedral (B-site).