Magnetic and dielectric properties of laminated Ca(Zn 1/3 Nb 2/3 )O 3 -Ni 0.8 Zn 0.2 Fe 2 O 4 magneto-dielectric composites

Abstract Laminated Ca(Zn1/3Nb2/3)O3(CZN)-Ni0.8Zn0.2Fe2O4(NZO) composites were prepared by the conventional solid-state sintering method. Compared with the common polycrystalline ceramics, the permeability of the CZN-NZO composites can be much enhanced by the laminated structure. Meanwhile, all the samples show excellent magneto-dielectric properties in a wide frequency range from 10 MHz to 1 GHz. The results indicate that this kind of magneto-dielectric composites can be used in the high frequency communications for the capacitor-inductor integrating devices such as miniaturized antennas, filters and electromagnetic interference suppression devices. The permeabilities of the laminated CZN-NZO composites are well fitted with the Maxwell-Garnett mixing law.