The implementation of smart and logical design for absorbers, along with careful selection of components, has proven to be a successful strategy in creating efficient electromagnetic wave (EMW) absorbers. By utilizing novel nanocomposite materials that integrate various loss mechanisms, including enhanced magnetic and dielectric loss, multiple scattering and reflection, and polarization loss, the fabrication of a gradient bi-layer absorber holds great promise for superior EMW absorption. By employing chemical methods, a novel dielectric-magnetic compound comprising of CoFeAl Heusler Alloy and MWCNTs@NiSe was produced. Subsequently, a gradient bi-layer absorber was developed using these components to optimize impedance matching and bolster low-frequency absorption. Abundant hetero-interfaces within this ternary bi-layer nanocomposite absorber give rise to Schottky junctions and heightened interfacial polarization between its layers, components, and matrix. Notably, the utilization of CoFeAl Heusler Alloy nanoparticles has been shown to lead to the manifestation of magnetic loss phenomena due to their inherent magnetic properties. Through the strategic utilization of the unique layer structure, in conjunction with the incorporation of multiple loss mechanisms, the ternary bi-layer nanocomposite was able to achieve an impressive reflection loss value of -29 dB, despite having a mere 1.4 mm total thickness. Our study offers a fresh framework for creating innovative bilayer gradient absorbers suitable for low frequency applications.

中文翻译：

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用于降低能耗和改善电磁波耗散的梯度双层涂层：阐明界面和界面极化的作用

事实证明，对吸波器进行智能和逻辑设计以及仔细选择组件是创建高效电磁波 (EMW) 吸波器的成功策略。通过利用集成了各种损耗机制（包括增强的磁损耗和介电损耗、多重散射和反射以及偏振损耗）的新型纳米复合材料，梯度双层吸收体的制造有望实现卓越的电磁波吸收。采用化学方法，制备了一种由 CoFeAl Heusler 合金和 MWCNTs@NiSe 组成的新型介电磁性化合物。随后，使用这些组件开发了梯度双层吸波器，以优化阻抗匹配并增强低频吸收。这种三元双层纳米复合材料吸收体中丰富的异质界面产生了肖特基结，并增强了其各层、组件和基体之间的界面极化。值得注意的是，CoFeAl Heusler 合金纳米粒子的使用已被证明由于其固有的磁性而导致磁损耗现象的表现。通过战略性地利用独特的层结构，结合多种损耗机制，三元双层纳米复合材料能够实现令人印象深刻的 -29 dB 的反射损耗值，尽管总厚度仅为 1.4 毫米。我们的研究为创建适合低频应用的创新双层梯度吸收器提供了一个新的框架。