Structural, magnetic and microwave absorption properties of SrFe12−2x(Mn0.5Cd0.5Zr)xO19 ferrite

In this research, the M-type strontium hexaferrite nanoparticles, SrFe12−2x(Mn0.5Cd0.5Zr)xO19, (x=0.0−1.6), have been synthesized by the coprecipitation method. X-ray diffraction, a field emission scanning electron microscope, a vector network analyzer and a vibrating sample magnetometer were used to characterize their structures, electromagnetic and microwave absorption properties of samples. The results indicated the formation of hexaferrite structure for all samples. The sample with x=1.4 showed a minimum reflection loss of −52 dB at 14.5 GHz with reflection loss less than −20 dB over the extended frequency range of 13.6–16.5 GHz. Finally SrFe9.2(Mn0.5Cd0.5Zr)1.4O19 could be considered as a good candidate for thin microwave absorbers in the gigahertz range. - Highlights: • The M-type strontium hexaferrite, SrFe12−2x(Mn0.5Cd0.5Zr)xO19, has been synthesized by the coprecipitation method. • The saturation magnetization increased at low doping content x=0.2. • The ferrite with x=1.4 and thickness of 1.9 mm exhibits high absorption loss and wide bandwidth. • Bandwidth covered by this composite is about 3 GHz