Comprehensive study of electromagnetic wave absorption properties of GdMnO3-MoSe2 hybrid composites

Recently, the public does not avoid the use of RF/microwave communication and non-communication devices, which means they will be constantly exposed to radiation from those devices, which will worsen their health in the long term, as well as there will be interference and coupling effects between devices. In this paper, a novel and high-performance absorber material is created and analyzed. The microscopic and macroscopic properties of Gadolinium Manganite (GdMnO3), Molybdenum Diselenide (MoSe2), and three mixtures of GdMnO3-MoSe2 (GdMo) with 20, 30, and 40% filler loading were investigated. The procedure for producing the five materials was explained and described in detail. The mixture of GdMo with 20, 30, and 40 wt% filler loading has the features of GdMnO3 and MoSe2. For macroscopic analysis, the measured relative complex permittivity and permeability of the five synthesized materials are modeled using the Lorentz dispersion model. Among the five study materials, GdMo with 40 wt% filler loading shows the highest electric and magnetic losses with loss tangent, tan delta e approximate to 0.228 and tan delta m approximate to 0.38 where the absorption performance is better compared to its pristine components, namely GdMnO3 and MoSe2. Based on the transmission theory of metal plate backing materials, the GdMo with 40 wt% filler loading and thicknesses ranging from 0.0014 m to 0.0021 m, which is terminated by a metal plate on the back side, exhibited the optimum microwave absorption performance with a minimum reflection loss value better than-20 dB at X-band operating frequency. Without a metal backing, a 0.008 m thickness of GdMo with 40 wt% can achieve reflection loss, RL of-10 dB from 9.2 GHz to 12.4 GHz, and RL of-20 dB from 11.1 GHz to 12.4 GHz.

Automated summary

Recently, the use of RF/microwave communication and non-communication devices has become unavoidable for the public, leading to constant exposure to radiation from these devices, which can negatively impact long-term health and cause interference and coupling effects. In this study, a novel and high-performance absorber material, including GdMnO3, MoSe2, and mixtures of GdMnO3-MoSe2 (GdMo) with different filler loadings, was created and analyzed. The macroscopic properties of the synthesized materials were modeled using the Lorentz dispersion model, and it was found that GdMo with 40 wt% filler loading exhibited the best microwave absorption performance. This material, with an optimized thickness and a metal plate backing, achieved a minimum reflection loss value of better than -20 dB at the X-band operating frequency.