The effect of nano- SiO 2 on the magnetic and dielectric properties of lithium cadmium ferrite

Abstract

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 0.35Cd 0.3 Fe 2.35O 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.