Dielectric relaxation and magnetic resonance of nitrogen-doped graphene-coated FeNi nanoparticles on nitrogen-doped carbon nanosheets

Hierarchical and Orderly Surface Conductive Networks in Yolk–Shell Fe3O4@C@Co/N‐Doped C Microspheres for Enhanced Microwave Absorption

“…Meanwhile, the imaginary part of permittivity (𝜖″) can be further divided into conduction loss (𝜖 c ″) and polarization loss (𝜖 p ″). The conduction loss is related to the frequency and the conductivity of composites, which can be deduced as follows: [51] 𝜀…”

“…Meanwhile, the imaginary part of permittivity ( ε″ ) can be further divided into conduction loss ( ε c ″ ) and polarization loss ( ε p ″ ). The conduction loss is related to the frequency and the conductivity of composites, which can be deduced as follows: [ 51 ] $$$$\begin{eqnarray}{\varepsilon }_c{\rm{^{\prime\prime}}} = \frac{\sigma }{{2\pi {\varepsilon }_0f}}\end{eqnarray}$$$$where ε 0 is vacuum permittivity. The conduction loss of each sample is higher at low frequencies, while gradually decreasing at higher frequencies.…”

A review on composite strategy of MOF derivatives for improving electromagnetic wave absorption

“…But it is worth noting that too high conductivity will cause the skin effect, which leads to impedance mismatch so that more EMWs are reflected on the surface of the EMW absorbing material, which reduces the EMW absorption performance. 75 …”