Abstract
In this present research, comparative analysis of dielectric and electrical properties of M−type lanthanum-strontium (La-Sr) hexaferrites substituted with Co-Zr, Mn-Zr and Ni-Zr with chemical formulae: Sr0.85La0.15(CoZr)xFe12-2xO19, Sr0.85La0.15(MnZr)xFe12-2xO19 and Sr0.85La0.15(NiZr)xFe12-2xO19 (where x is 0.00 to 1.00 with ratio of 0.25) respectively have been investigated in 1 kHz to 1 MHz frequency range. The dielectric constant and loss tangent are generally shows decreasing trend with frequency and AC conductivity shows increasing trend with it. Dielectric constant, tangent loss and AC conductivity are increased with increase in substitution of Co-Zr and Mn-Zr doped La-Sr ferrites but shows opposite trend for Ni-Zr doped La-Sr hexaferrites. The higher electron exchange between ferrous cations (Fe2+) and ferric (Fe3+) cations are responsible for the higher polarization in ferrites. These newly synthesized ferrites have great potential for microwave absorbing material and microwave components
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