Figure 6

Complex permeability of (a) carbon black/epoxy resin as a matching layer and Ni_0.6Zn_0.4Fe₂O₄/epoxy resin as an absorbing layer; and (b) Ni_0.6Zn_0.4Fe₂O₄/epoxy resin as a matching layer and carbon black/epoxy resin as an absorbing layer.