The effect of nano-SiO_2 on the magnetic and dielectric properties of lithium cadmium ferrite

摘要

An extensive study of magnetic and dielectric properties have been investigated on a series of nano silicon dioxide (10 nm) with the addition of 2,4, 6, 8 wt% in Li_(0.35)Cd_(0.3)Fe_(2.35)O_4 prepared using the sol-gel technique. The saturation magnetic moment (Ms) value for a pristine sample has been measured at 73.7 emu/g and it varies non-monotonically for different SiO_2 additions in LiCd ferrite. A maximum value of 79 emu/g has been found for 2 wt% nano SiO_2/LiCd ferrite. These sol-gel prepared samples exhibit a markedly increased value in real part of dielectric constant (ε') and a lowest loss tangent (tan δ) measured in the frequency range 1 KHz-1 MHz, better results in LiCd ferrite being found rarely.