Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 16, 2025

Abstract Soft magnetic alloys, featured with high permeability, hold significant potential in low‐frequency electromagnetic wave absorption. However, the limitations of narrow absorbing bandwidth and susceptibility to corrosion restrict their extensive application. Here, this work demonstrates a joint magnetic‐structural strategy FeSi successfully addressing challenge. Through typical process inducing flaky‐shape anisotropy bidirectional Mott–Schottky heterojunctions, microwave absorption alloys is effectively reinforced. The minimum reflection loss (RL min ) achieves −43 dB, effective (EAB, defined as RL < −10 dB) spanning up 4.1 GHz S/C bands. Meanwhile, resistance essentially improved reduction corrosive current (I corr from 3.984 0.427 µA cm −2 5 wt.% NaCl/H 2 O solution. enhanced performance originates planar configuration extends permeability beyond Snoek limit for heterointerfaces regulate interfacial charge distribution, amplifying polarizations forming passivation layers inhibition. Theoretical modeling confirms that Mn 3 4 ‐mediated redistribution optimizes impedance matching by balancing permittivity permeability. This establishes feasible method regulating magnetic/dielectric parameters enhance attenuation environmental durability alloy absorbents.

Language: Английский