Investigation of structural, magnetic and microwave absorption properties of NixCo1-xFe2O4/Ni:ZnO (x:0.0, 0.5, and 1.0) embedded epoxy composites
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CitationKıvrak, B., Tümen, K.U., Karaaslan, M., Akyol, M. (2022). Investigation of structural, magnetic and microwave absorption properties of NixCo1-xFe2O4/Ni:ZnO (x:0.0, 0.5, and 1.0) embedded epoxy composites. Applied Physics A: Materials Science and Processing, 128 (9), art. no. 758. https://doi.org/10.1007/s00339-022-05905-2
In this study, NixCo1−xFe2O4/Ni:ZnO (x:0.0, 0.5, and 1.0) epoxy-based composite structures were manufactured by sol–gel method. The structural, morphological and magnetic characteristics were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). Electromagnetic wave (EMW) absorption measurements were carried out using a vector network analyzer (VNA) between 8 and 12 GHz (X band). Ni substitution with Co decreases the crystallite size, average particle size, magnetic saturation (Ms) and the coercive field (Hc) values of cobalt-ferrite spinel structure. EMW characterization results showed that minimum reflection loss (RL) − 30.91 dB (99.9% absorption) at 10.76 GHz, and the maximum bandwidth of 1.81 GHz were observed for the RAM1 composite. In addition, the substitution of Ni2+ into the cobalt–ferrite structure resulted in the shifting absorption peaks to the higher frequency region (towards Ku band).