▎ 摘　　要

To solve the problem of dispersion of magnetic nanoparticles in ultralight electromagnetic absorption field, checkerboard-like nickel nanoislands/defect graphene aerogel (NIDG) with enhanced surface plas-mon resonance was designed and prepared through electrostatic self-assembly method. This special structure successfully overcame the aggregation phenomenon of magnetic metals and built high -density gap regions to enhance surface plasmon resonance. And the NIDG has achieved excellent electro-magnetic wave absorption performance in C band. Specially, NIDG is superior in ultra-lightness with only 6.2 wt%, compared to some recently reported magnetic electromagnetic wave absorbers. Such great per-formance can be attributed to the enhanced surface plasmon resonance and improved impedance match-ing. This work is significant for achieving effective dielectric loss and designing lightweight low -frequency EMW absorbing materials.(c) 2022 Elsevier Inc. All rights reserved.