Substitution effect of Me = Al, Bi, Cr and Mn to the microwave properties of polyaniline/BaMeFe11O19 for absorbing electromagnetic waves

Polyaniline/substituted barium hexaferrites (abbreviated Pani/BaMeFe11O19, where Me = Al, Bi, Cr and Mn) composites are investigated to be potential electromagnetic wave absorber from 1 to 18 GHz frequency range. Solid-Based Polymerization method is used to prepare the samples with 10% volume fraction of hexaferrite. The effects of iron substitution in hexaferrite composites by trivalent ions Al3+, Bi3+, Cr3+ and Mn3+ on permittivity,...