Bilayer magnetic composite systems made of random anisotropy hexaferrite and soft metallic magnets for stealth technology

被引：0

作者：

la Rosa, Jaume Calvo-De ^{[1
,2
]}

Lopez Anchez, Jesus-S. ^{[3
,4
]}

Hernandez, Joan Manel ^{[1
,2
]}

Marın, Pilar ^{[3
,4
]}

Tejada, Javier ^{[1
]}

机构：

[1] Departament de Fısica de la Materia Condensada, Universitat de Barcelona, Martı i Franques 1, Barcelona,08028, Spain

[2] Institut de Nanociencia i Nanotecnologia (IN2UB), Universitat de Barcelona, Barcelona,08028, Spain

[3] Instituto de Magnetismo Aplicado (IMA-UCM-ADIF), Madrid,28230, Spain

[4] Departamento de Fısica de Materiales, Facultad de Fısicas, Universidad Complutense de Madrid (UCM), Madrid,28040, Spain

来源：

Oxford Open Materials Science | 2024年 / 4卷 / 01期

关键词：

Magnetic anisotropy - Metallic matrix composites - Nanoclay - Nanocomposites - Powder metals - Radar reflection - Radar shielding - Soft magnetic materials;

D O I：

10.1093/oxfmat/itae016

中图分类号：

学科分类号：

摘要：

An experimental strong increase of the reflection loss (from 25 up to 35 dBs) and an extension of the absorption bandwidth up to 20% is measured in a set of novel functional bilayer systems. We focus our work on studying the samples in an anechoic chamber under far-field real radar conditions. Each layer consists of a composite material, typically a dielectric matrix filled with random anisotropy hexaferrite and soft metallic materials (powder or wires). Combining the two types of materials into a submillimetric bilayer structure has shown unprecedented improvements in microwave absorption capacities compared to the former absorption of each layer. The capacity to improve the shielding behavior is strongly related to each layer’s permittivity, permeability, and thickness leading, therefore, to a strong control over the design of novel materials for stealth applications. © The Author(s) 2024.

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