Structural, Magnetic and Electromagnetic Absorption Properties of SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹/BaTiO۳ Nanocomposites Prepared By Sol- Gel Auto Combustion Method

In this research, first, nanoparticles of SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹ hexaferrite was synthesized via sol-gel autocombustion process and then the nanocomposites of hexagonal ferrites/perovskite with the amounts of SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹ /BaTiO۳ (۵۰/۵۰, ۴۰/۶۰, ۷۰/۳۰ w/w) was prepared by ball-milling method. FTIR spectra were shown that the bands at about ۴۰۰ and ۵۰۰ cm-۱ proved the formation of hexagonal ferrites. XRD analysis was confirmed the formation of hexaferrite and perovskite phase of BaTiO۳. FESEM pictures was represented the formation of hexagonal nanoparticles and sphere shape of BaTiO۳. VSM hysteresis loop was revealed that SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹ belonged to the soft magnetic materials due to the ۶۰۴.۴۵Oe coercivity. By formation of nanocomposites the coercivity was increased up to ۱۵۰۰ Oe. VNA analysis was VNA analysis revealed that the maximum absorption of -۱۶.۴db at ۱۱.۵ GHz frequency for SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹ /BaTiO۳ (۶۰/۴۰) nanocomposite. Microwave absorption properties of samples was investigated by (vector network analyzer) VNA. The maximum value of reflection loss was --۱۶.۴db at ۱۱.۵ GHz frequency for SrFe۱۱.۹۸Mg۰.۱Sn۰.۱O۱۹ /BaTiO۳ (۶۰/۴۰) nanocomposite.

کلیدواژه ها:

Hexaferrite ، Ball- milling ، Vector network analyzer ، Perovskite