article · Applied Physics A
Abstract NiFe 2 O 4 nanoparticles have been synthesized using the flash auto-combustion technique, while TiO 2 nanoparticles were prepared via sol–gel method. NiFe 2 O 4 /TiO 2 nanocomposite was obtained through the sonochemical method. Investigated samples have been studied through XRD, FTIR, and FESEM. The crystallite sizes of NiFe 2 O 4 , TiO 2 , and NiFe 2 O 4 /TiO 2 are 48.37, 25.56, and 32.46 nm, respectively. FTIR analysis was used to look into the materials’ functional groups. The images of FESEM illustrated that the particles were prepared in nanoscale. All samples were good absorbers in the UV spectrum through the wavelengths of 200–350 nm. The energy band gap values of TiO 2 , NiFe 2 O 4 , and NiFe 2 O 4 /TiO 2 nanocomposite are 3.4, 2.3, and 2.5 eV, respectively, for the indirect transition. The samples’ dielectric characteristics have been investigated and they have a semiconductor like behavior. VSM and the Faraday technique were used to test the materials’ magnetic characteristics.
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DOI: 10.1007/s00339-024-07397-8
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