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(a) TEM and (b) high-resolution-TEM image of FeCo/C nanocapsules, (c) scanning-TEM image of (a), and (d) energy dispersive spectrum of the dotted area in (c).
(a) Relative complex permittivity and (b) relative complex permeability of FeCo/C nanocapsules dispersed in paraffin as a function of frequency (open squares and triangles represent measured data, dashed lines of the smoothed curves of and ).
Frequency dependence of the dielectric loss factor and the magnetic loss factor of FeCo/C nanocapsules dispersed in paraffin.
Frequency dependence of the dielectric- and magnetic-loss factors of FeCo/C nanocapsules dispersed in paraffin.
Three-dimensional representations of RL with (a) the measured and and (b) the smoothed and .
EM-wave absorption properties of some recently reported nanocomposites. The optimal RL means the largest absolute value of the reflection loss, namely, the best absorption. The absorbent thickness denotes the layer thickness (range) for which . The absorption bandwidth is the frequency range in which can be achieved.
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