Highly anisotropic Fe₃C microflakes constructed by solid-state phase transformation for efficient microwave absorption.

ABSTRACT: Soft magnetic materials with flake geometry can provide shape anisotropy for breaking the Snoek limit, which is promising for achieving high-frequency ferromagnetic resonances and microwave absorption properties. Here, two-dimensional (2D) Fe₃C microflakes with crystal orientation are obtained by solid-state phase transformation assisted by electrochemical dealloying. The shape anisotropy can be further regulated by manipulating the thickness of 2D Fe₃C microflakes under different isothermally quenching temperatures. Thus, the resonant frequency is adjusted effectively from 9.47 and 11.56 GHz under isothermal quenching from 700 °C to 550 °C. The imaginary part of the complex permeability can reach 0.9 at 11.56 GHz, and the minimum reflection loss (RL_min) is

SUBMITTER: Zhao R 

PROVIDER: S-EPMC10876570 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature