Flexible rGO/Fe<sub>3</sub>O<sub>4</sub> NPs/polyurethane film with excellent electromagnetic properties

Flexible rGO/Fe₃O₄ NPs/polyurethane film with excellent electromagnetic properties

Yu Wei-Qi^{1, 2}, Qiu Yi-Chen³, Xiao Hong-Jun^{2, †}, Yang Hai-Tao^{3, 4}, Wang Ge-Ming^{1, ‡}

(a) Frequency-dependent relative complex permittivity and (b) frequency-dependent relative complex permeability. Frequency-dependent RL for the rGO/Fe₃O₄ NPs/PU films with different thicknesses, annealed at 300 °C (c) and at 500 °C (d).