Fabrication of N-Doped rGO/Mn–Co Ferrite Composites for Broadband Microwave Absorption.

The development of wideband, lightweight, thinly matched electromagnetic absorbing materials with high absorption capacity is crucial for addressing the issues of electromagnetic radiation and pollution. In this study, NrGO/Mn 0. 5 Co 0. 5 Fe2O4 composites were effectively produced using a simple two-step technique. The structural study revealed a painstakingly constructed entanglement architecture made up of crumpled NrGO and Mn 0. 5 Co 0. 5 Fe2O4 microspheres inside the NrGO/Mn 0. 5 Co 0. 5 Fe2O4 composites as it was manufactured. The NrGO/Mn 0. 5 Co 0. 5 Fe2O4 composites absorb microwaves substantially better than pure Mn 0. 5 Co 0. 5 Fe2O4, which has a reflection loss (RL) of −10 decibels across all tested frequencies. The effective absorption bandwidth of 2.54 mm thick NrGO/Mn 0. 5 Co 0. 5 Fe2O4 composite (30 wt.%) was 6.4 GHz, spanning from 10.07 GHz to 16.47 GHz. The optimal RL at a frequency of 12.9 GHz was notably improved to −42.4 dB. This remarkable capability of absorbing microwaves is mainly associated with the joint effects of interfacial polarization, magnetic particle resonance and the capacitor effect exhibited by NrGO and Mn 0. 5 Co 0. 5 Fe2O4. The results show that NrGO/Mn 0. 5 Co 0. 5 Fe2O4 composites can be used as efficient electromagnetic wave-absorbing materials. NrGO/Mn0.5Co0.5Fe2O4 composite was prepared by a simple two-step method. The morphology was characterized by SEM and TEM. The composites have excellent electromagnetic wave absorption performance and radar cross-section reduction. An effective bandwidth of 6.4 GHz (10.07 – 16.47 GHz) and the RLmin of –42.4 dB was obtained at 2.54 mm. [ABSTRACT FROM AUTHOR]