A novel carbon nanotubes/Fe3O4 inorganic hybrid material: Synthesis, characterization and microwave electromagnetic properties

► The magnetite particles with nanoscale sizes were self-assembled along multiwalled carbon nanotubes through a simple, effective and reproducible solvothermal method. ► The denseness, size and crystallinity of magnetite attached on the surface of CNTs can be altered by controlling the reaction parameters. ► The magnetic loss was caused mainly by ferromagnetic natural resonance, which is in agreement with the Kittel equation, and is believed to have potential applications in the microwave absorbing area.