Magnetic and structural analysis of BaZnxZrxFe12-2xO19 (x=0.1-0.7) hexaferrite samples for magnetic applications

Polycrystalline samples of M-type hexaferrite with BaZnxZrxFe12-2xO19 (x = 0.1-0.7) as chemical composi-tion were synthesized successfully using solid state reaction technique. The structural, microstructural and magnetic properties of these samples were investigated. Rietveld analysis (goodness-of-fit center dot 1.06-1.22) demonstrates the phase purity of the samples in the entire composition range. The `c/a ' ratio is < 3.98, for all samples implying that they are M-type hexaferrites. The XRD results also show a simultaneous decrease in crystallite size (149-69 nm) and an increase in cell volume (699.119-711.0 06 A3) with increasing dopant concentration. FESEM micrographs reveal that the a) average grain size varies within 0.61-0.79 mu m and b) sample porosity decreases with increasing concentration of Zn2+- Zr4+dopants. EDX data reveals the pre-sence of all the elements and Ba:Fe ratio center dot 1:12. M-H studies reveal that a) Ms increases from 61.45 emu/g (at x = 0) to 72.87 emu/g (at x = 0.1) and decreases afterwards to 61.45 emu/g (at x = 0.7) and b) Hc decreases continuously from 4118 Oe (at x = 0.0) to 319 Oe (at x = 0.7). The excellent magnetic properties of these hexaferrite samples make them useful in magnetic data storage devices, devices for microwave absorption and in spintronic devices.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

Polycrystalline samples of M-type hexaferrite with varying chemical composition were successfully synthesized using solid state reaction technique. The structural, microstructural and magnetic properties of these samples were investigated. The results showed good phase purity, decreased crystallite size and increased cell volume with increasing dopant concentration. Furthermore, the hexaferrite samples exhibited excellent magnetic properties, making them suitable for various applications.