Study on structure and magnetic properties of sub-micron Fe-B particles

This paper describes the study on structure and magnetic properties of Fe-B particles with submicron sizes synthesized by chemical preparation in aqueous solutions. The shape and structure of the particles are spherical and amorphous regardless of median size. Both the remanence magnetic ratio and coercivity of the particles are independent of median size and become lower, suggesting the good magnetic softness with the low hysteresis loss. Furthermore, as for the dynamic magnetic properties of the particles, each ferromagnetic resonance (FMR) peak can be observed in the frequency range of approximately 3-5 GHz and their line-widths are broad. These results demonstrate that these amorphous Fe-B spherical particles with submicron sizes are one of the candidates as soft magnetic materials for next generation high-frequency magnetic devices.