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Constructing flower-like core@shell structured CoFe@MoO2/MoS2 magnetic nanocomposites for strong wideband microwave absorption

Lin Long,Xiaosi Qi,Lei Wang,Shaohong Cai,Mingsen Deng

Magnetic-dielectric nanocomposites with excellent synergetic effect were deemed as the ideal candidates for high-performance microwave absorbers (MAs). Herein, we adopted a simple hydrothermal route and hydrogenous reduction to synthesize magnetic-dielectric CoFe@MoO 2 /MoS 2 flower-like multicomponent nanocomposites (MCNCs). By controlling the different reduction temperature and time, the content of component (i.e., CoFe, MoO 2 and MoS 2 ) can be easily tuned, which is conducive to adjust electromagnetic parameter and optimize magnetic loss. Results demonstrated that the CoFe@MoO 2 /MoS 2 flower-like MCNCs could be easily regulated by simply changing the content of CoFe in favor of improved magnetic loss and optimized impedance matching. So, the prepared magnetic-dielectric CoFe@MoO 2 /MoS 2 flower-like MCNCs presented the minimum reflection loss of −55.91 dB and the widest effective bandwidth of 7.24 GHz. The strategies for adjusting rich interfaces and optimized magnetic loss are very instructive for the development of high-performance MAs and devices.