Structural, magnetic and microwave properties of Ba1-xNdxFe12O19

Abstract

Barium ferrite (BaFe12O19) is a multiferroic material with many excellent properties and is easily available. It has good magnetic performance and microwave absorption performance, but it only has the maximum transmission loss in the high-frequency range. To improve its performance, the method of doping is used to improve. The Ba1-xNdxFe12O19 (0 ≤ x ≤ 0.15) was prepared by the sol–gel method. Through the XRD, SEM, VSM, and VNA to characterized the structure and performance of the samples. The results show that Nd ions replace Ba in barium ferrite, and no second phase appears. Along with the doping content increases, the particle size gradually decreases. There is the maximum saturation magnetization and coercive force when x = 0.10. It is attributed to the magnetic Nd ion replacing Ba2+, the magnetic moment increases cause the saturation magnetization increases, the change of Fe3+ and Fe2+ led to the magnetocrystalline anisotropy and the coercive force are increases. When x = 0.10, the complex permittivity increases, the microwave absorption characteristics become well which the maximum reflection loss reaches −34.4 dB, and the bandwidth increases to 4.69 GHz. It can be used in a wider range of fields.