Iron phthalocyanine oligomer/Fe3O4 hybrid microspheres and their microwave absorption property

► The hybrids were monodispersed microspheres and the morphology and size can be adjusted by controlling the pre-polymerization time. ► The dielectric loss of the hybrid microspheres was larger and a new magnetic loss peak appeared at high frequency. ► The saturation magnetizations increased with increase in the pre-polymerization time while the coercivities decreased.