Magnetic and microwave absorption properties of BaMgx/2Mnx/2CoxTi2xFe12−4xO19 hexaferrite nanoparticles

作者: Reza Shams Alam , Mahmood Moradi , Hossein Nikmanesh , Joao Ventura , Mohammad Rostami

DOI: 10.1016/J.JMMM.2015.11.038

关键词:

摘要: Abstract Substituted barium hexaferrite nanoparticles with nominal composition of BaMg x /2 Mn Co Ti 2 Fe 12−4 O 19 ( =0–0.5) were synthesized by a co-precipitation method. Then, the structural, magnetic and microwave characteristics representative samples examined employing X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), scanning electron microscopy (SEM), transmission (TEM), vibrating sample magnetometer (VSM) vector network analyzer (VNA). The XRD, along FTIR evaluations confirmed successful substitution Mg, Mn, cations in lattice. microstructure also proved that mean particle size decreases typical morphologies are gradually varying from almost platelet =0) to irregular shapes =0.5) increasing dopant concentration. Hysteresis loops revealed saturation magnetization increased up level =0.2, then decreased abruptly. In addition, coercivity exhibited decreasing trend 3669 Oe 708 Oe amount substitution. Finally, measurement showed substituted =0.5 could be used as an efficient absorption material appropriate bandwidth 6 GHz 10–16 GHz frequency range.

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