Sn-Co co-substituted SrSnxCoxFe12-2xO19 strontium hexaferrites: Correlation between chemical composition, magnetic and electrical properties

M-type strontium hexaferrites attract great attention due to the scientific importance and practical significance. It was observed the correlation between chemical composition, structural parameters, magnetic and electrical properties in heterovalent double substituted Sr hexaferrites. As substituents were used Co2+ and Sn4+ ions. X-ray diffraction data is used to compute a variety of parameters, including lattice parameters, and size of crystallite, in addition to validating purity of the materials. All investigated samples were single phase and characterized by the P63/mmc space group. Increase of the substituent concentration leads to the increase of the lattice parameters that correlated well with average ionic radii of the Fe3+, Co2+ and Sn4+. The average size of a crystallite was between 31 and 45 nm. Magnetic parameters were obtained from field dependences of the specific magnetization It was observed non-linear dependence in magnetic properties as function of the chemical composition. Increase of the sn-Co concentration leads to increase of the DC electrical resistivity. The dielectric constant is reduced while DC electrical resistivity increased from 5.94 to 11.7 x 109 Ohm cm, suggesting that materials can be employed in microwave devices because of their high resistivity and minimal dielectric constant.