Electromagnetic wave absorption of polymeric nanocomposites based on ferrite with a spinel and hexagonal crystal structure

► By varying the chemical compositions it is possible to control the electromagnetic properties. ► Precursors of nano powders with different phases were synthesized using co-precipitation method. ► It is possible to prepare materials with a natural resonance in different frequency ranges. ► Ferrites with a spinel structure are useful as absorber materials in the lower GHz range. ► Hexagonal ferrites are a special kind of absorbing material in the range above 32 GHz.