Abstract
Co2Z barium ferrite particles with coated Ag nanoparticles were prepared to increase permittivity. The microwave-absorbing properties of the Ag-coated Co2Z particle composite showed that the stronger reflection loss (RL) peak and smaller absorber thickness could be achieved simultaneously compared with the pure Co2Z barium ferrite particles with the same permeability but smaller permittivity. This enhanced absorption phenomenon was discussed using quarter-wave length cancellation. The separated electromagnetic wave energy reflected at the air-absorber (AA) interface and absorber-metal plate (AM) interface was achieved by measuring reflection coefficients of the composites without (S11-OPEN) and with (S11-SHORT) a backed metal plate to investigate the RL enhancement.
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