Fig. 5.
Frequency dependence of εr. a 3D NC, b 3D Ni–NC, c 3D Cu–NC, d 3D Co–NC, e 3D Fe-NC, and f 3D Mn–NC. g–h Frequency dependence of εc״ and εp״ of 3D M–NCs and 3D NC. i The εc״ and εp״ values of 3D M–NCs and 3D NC cover the range of 2–18 GHz
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