Structural, magnetic, and microwave absorbing properties of NiTiO3/CoFe2O4 composites

In this study, different volume ratios (NiTiO3: CoFe2O4 = 1:3, 2:3, 1:1) of NiTiO3/CoFe2O4 composites were synthesized using the sol-gel method. The effects of different NiTiO3 volume ratios on the structural, morphological, magnetic, and microwave properties were systematically investigated by X-ray diffraction spectroscopy (XRD), field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy (RAMAN), vibrating-sample magnetometery (VSM), and vector network analysis. Electromagnetic wave absorption analysis indicated that 1:3 composite sample showed the greatest reflection loss (-21.7 dB at 17.1 GHz frequency) at a thickness of 10.0 mm. The microwave absorbing properties decrease with the increasing NiTiO3 volume ratio. The observed improvement can be attributed to the low degree crystallization of NiTiO3 that increases magnetic losses through increased exchange resonance. (c) 2022 Published by Elsevier B.V.

Automated summary

In this study, NiTiO3/CoFe2O4 composites with different volume ratios were synthesized using the sol-gel method, and their structural, morphological, magnetic, and microwave properties were systematically investigated. The results showed that the composite sample with a 1:3 volume ratio exhibited the best microwave absorption performance at a thickness of 10.0 mm.