Abstract
M-type nanosized barium hexaferrite BaMexFe12−xO19 (Me = Al3+ and x = 0.0, 0.4, 0.8) was synthesized by sol–gel auto-combustion method using urea as a fuel. Characterization of prepared sample was done by using different techniques, such as XRD (X-ray diffractometer), SEM (scanning electron microscope), EDAX (energy dispersive X-ray analysis), TEM (transmission electron microscope) and vibrating sample magnetometer (VSM). XRD studies show the formation of M-type barium hexagonal ferrite with space group P63/mmc. The effect of substitution of Al3+ ion for Fe3+ ion on the unit cell parameter, density, porosity has been studied. The SEM study shows that the samples exhibit spherical-shaped particles and agglomeration of individual particles in some parts. EDAX study confirms the elemental composition of prepared samples. TEM images confirm the nanosize of prepared samples. The VSM or magnetic study reveals that the saturation magnetization (Ms) value decreases from 57.1 to 33.6 emu g−1, while coercivity (Hc) value increases from 1737 to 2071 Gauss by the substitution of Al content. Substitution of Al3+ ion in barium hexaferrite significantly improves the magnetic properties.
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Acknowledgements
Saumya Giri is thankful to Dr Ambedkar College, Deekshabhoomi, Nagpur (MS), India, for providing sample synthesis and electrical facilities. The author is also thankful for SEM-EDX facility provided by SAIF, Kochi, VSM facility in IIT Roorkee and TEM facility provided by IIT Mumbai.
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GIRI, S., SAHU, D.K., SARKAR, N.N. et al. Study of structural and magnetic properties of aluminium-substituted nanosized barium hexaferrite prepared by sol–gel auto-combustion technique. Bull Mater Sci 44, 124 (2021). https://doi.org/10.1007/s12034-021-02433-2
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DOI: https://doi.org/10.1007/s12034-021-02433-2