Structural and magnetic properties of flaky FeSiB/Al2O3 soft magnetic composites with orientation of a magnetic field

In this paper, flaky FeSiB/Al2O3 soft magnetic composites (SMCs) were prepared with the parallel or perpendicular orientation of an external magnetic field. The results showed that anisotropic structures were formed in FeSiB/Al2O3 SMCs, which can be attributed to the response of flaky particles with high shape anisotropy to the external magnetic field. For the parallel FeSiB/Al2O3 SMC, the particle plane of flaky FeSiB was parallelled to the working magnetic circuit, which further affected the easy axis, air gap length, demagnetizing field, and magnetic reluctance. The resulting DC and AC magnetic properties, such as saturation magnetization, effective permeability, complex permeability, energy loss, and frequency stability of permeability were all distinctly optimized.