Ni-Zn Ferrites Essay
IMPROVED MAGNETIC AND ELECTRICAL PROPERTIES OF VANADIUM DOPED NI –ZN FERRITE
V.Lakshminarayana1, K.Chandramouli1, G.S.N.Rao2*
1Dept of Physics, AU College of Engineering, Andhra University, Visakhapatnam, A.P., India
2Dept of Physics, Government College for Women, Srikakulam, A.P., India
Abstract: A series of samples with the composition Ni0.65Zn0.35Fe2O4 + x V2O5 (x = 0.0 to 1.5 wt % in steps of 0.3 wt %) have been prepared by double sintered ceramic method. The samples are characterized by X-ray diffraction, Saturation magnetization and Curie temperature. Both the saturation magnetization and Curie temperature have been observed to decrease slightly with increasing concentration of the vanadium. An increasing trend in D.C. resistivity
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Several investigators [1, 2] have studied the electrical and magnetic properties of Ni-Zn ferrites with different additives. Improved electrical properties and degraded magnetic properties have been reported by the addition of tetravalent ions. Addition of trivalent ions enhanced the magnetic properties slightly. Additions of divalent lions decreased electrical conductivity. However, the influence of pentavalent ions on the properties of Ni-Zn ferrites seems to have received very little attention [3, 4]. It is desirable to bring out a systematic study of Ni-Zn ferrites substituted with pentavalent ions not only to estimate their influence on the electromagnetic properties on one hand but also to understand the methods of such changes on the other. It is proposed to investigate the effect of V2O5 addition in Ni-Zn ferrites in this …show more content…
Magnetism and .Magnetic materials, 312(2) 328-330 (2007),doi: 10.1016/j.jmmm.2006.10.698
[5] R.F.Soohoo, “Theory and applications of ferrites”. Englewood cliffs, NJ: Printice Hall, 6 (1960)
[6] G.W.Rathenav and J.L.Snoek, Phillips Res. Repts. 1, 239 (1946)
[7] L.Neel, Ann.Phys.(Paris) 3, (1948) 137
[8] Feng Li, Junjie Liu, David G. Evans, and, and Xue Duan, “Stoichiometric Synthesis of Pure MFe2O4 (M = Mg, Co, and Ni) Spinel Ferrites from Tailored Layered Double Hydroxide Precursors”, Chemistry of Materials 16 (8), 1597-1602 (2004). doi: 10.1021/cm035248c.
[9] M. Ramesh, et al, “Cation Distribution of Ni-Cu substituted Li-ferrites”, Ceramic International, 41(1) Part B, 1765-1770 (2015). doi:10.1016/j.ceramint.2014.09.122
[10] J.Smith and H.P.J.Wijn, Ferrites (Philips Technical Library), pp158 (1963)
[11] J.L.Snoek, “Dispersion and absorption in magnetic ferrites at frequencies above 1Mc/s” Physica, 14(4) p207-217 (1948). doi:10.1016/0031-8914(48)90038-X
[12] A.Globus, Thesis, Univ. Of Paris, France
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