Customized dielectric response via Debye parameters reverse engineering in LDH-derived heterostructures

The development of traditional electromagnetic wave absorbers has been constrained by an empirical trial-and-error approach, which fails to establish quantitative correlations between intrinsic Debye parameters and macroscopic performance.​ To address this issue, the present study proposes a human-computer interaction–driven reverse engineering framework for Debye parameters that implements a closed-loop strategy of parameter decoupling, dynamic optimization, and material synthesis. Guided by this framework, a C/ZnO/Fe₇Co₃ composite featuring a hierarchical flower-like porous structure and abundant heterointerfaces was constructed via​ gradient Fe³⁺/Co²⁺ doping and controlled pyrolysis of Zn-based layered double hydroxide (LDH) precursors. Through synergistic modulation of key Debye parameters ( σ , Δε , τ , and α ), the optimized CZFC-2 sample achieves an efficient coupling of multiple loss mechanisms, resulting in a remarkable effective absorption bandwidth of 6.56 GHz with​ a minimum reflection loss of −66.87 dB. This work not only establishes​ a customized optimization pathway for developing high-performance LDH-derived absorbers but also represents a significant shift in material design from empirical screening to parameter-directed regulation, offering a generalizable strategy for the rational design of next-generation advanced electromagnetic functional materials.