High-frequency FeSiAl-based soft magnetic composites via simultaneously suppressed eddy and hysteresis losses.

ABSTRACT: Soft magnetic composites present promising solutions for integrated transformers and inductors, but challenges arise at MHz range, where hysteresis and intra-eddy losses result in substantial performance degradation. In this study, we propose a bulk/interface insulation strategy to synthesize FeSiAl:Sn/Al₂O₃ soft magnetic composite by mutual diffusion of metal atoms, where a ~ 3 um-depth Sn-substituted FeSiAl is obtained in the matrix and an insulating Al₂O₃ layer is epitaxially grown on FeSiAl surface. The formation of FeSiAl:Sn can not only suppress intra-eddy loss by enhancing electrical resistivity, but also reduce coercivity by mitigating lattice distortion for reducing hysteresis loss. Meanwhile, the in-situ grown Al₂O₃

SUBMITTER: Li H 

PROVIDER: S-EPMC12572122 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature