Structural, Electrical, and Magnetic Study of SrNi2+(Li1+Fe3+)‎0.5Fe16O27 Ferrite

Abstract EN

W-type ferrite having chemical formula SrNi(LiFe)0.5Fe16O27 was prepared by using conventional solid state reaction method at little low temperature (1100°C).

The prolonged and continuous heating resulted in better product formation and it has validated that the Lithium present in the compound facilitates the synthesis.

Typical IR bands observed are assigned to the Fe–O bonds in S block of W ferrite structure and the band near 914.3 cm−1 is assigned to the stretching vibrations of Sr–O.

High resistivity is found which suggested presence of very small amount of mixed valency cations on equivalent lattice apart from the little amount created due to the release of an electron by divalent Ni to become trivalent.

The magnetic properties of compound do not differ much from those of the reported for SrNi2W ferrite except a little decrease in saturation magnetization at room temperature due to canting effect.

The experimental observations support presumed site preferences to a greater extent and also the prediction that the Li present on 4fVI sub-lattice results in small canting effect of 12k cations.

The low value of coercivity observed is attributed to the larger particle size resulting due to prolonged heating.