Research progress on electromagnetic wave absorption based on magnetic metal oxides and their composites

Recently, great efforts have been made to develop materials based on magnetic metal oxides to realize excellent electromagnetic wave absorption properties. Nevertheless, the use of traditional magnetic metal oxide materials with certain magnetic losses is not only difficult to meet the final requirements, but also limits the thickness of the absorber and their range of use. Therefore, some promising magnetic metal oxide composites with excellent conductive and magnetic losses have been fabricated, which have specific structures having and interfacial polarization and multiple reflections. Here, the theory of electromagnetic microwave absorption is discussed. Afterwards, the accomplishments in the fabrication of magnetic metal oxides and their composites are reviewed. Furthermore, electromagnetic wave absorption performances and relevant influencing factors of magnetic metal oxides and their composites are exhibited in detail. At last, current challenges are exhibited and future prospects of this developing field are discussed.