Facile synthesis and electromagnetic wave absorption properties of magnetic carbon fiber coated with Fe-Co alloy by electroplating

Magnetic carbon fiber coated with Fe-Co alloy was prepared by electroplating at 25 degrees C for 5 min. The obtained magnetic coatings show sheet-like morphology and the crystal structure of the uniform coating is Co3Fe7 with a thickness of about 0.5 mu m. The saturation magnetization of the magnetic carbon fiber reaches 31.5 emu/g with a coercivity of 87.1 Oe. The complex permittivity and permeability of magnetic carbon fiber/paraffin (30 wt%) composite were measured in the 2-18GHz frequency range. The reflection loss below -10 dB covers the whole frequency range while below -20 dB the absorption frequency bandwidth is 6.8 GHz, and the minimum value is -48.2 dB at a coating thickness of 1.7mm. Magnetic carbon fiber exhibits excellent electromagnetic wave absorption properties. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.