Seyed Salman Seyed Afghahi, Reza Torkamani, P. Dehghani
The use of absorbers is critical for protecting human health, enabling stealth applications, and preventing electromagnetic interference. Although various absorbers have been developed in recent years, many suffer from poor synergy and low attenuation efficiency, resulting in limited performance. Also, the factors affecting the increase in the effective absorption bandwidth have not been well addressed. Hexaferrites, with their ability to provide magnetic loss along with dielectric loss, are promising candidates for microwave absorbers. However, hexaferrites currently lack the necessary efficiency, and their microwave attenuation properties need to be enhanced. In this review article, we examine recent studies on M-type hexaferrites, focusing on the parameters influencing microwave absorption properties. The magnetic properties of these materials, along with the origins of their magnetic behavior, the structural characteristics, and various synthesis methods of hexaferrites, are thoroughly analyzed due to their significant impact on absorption performance. Finally, in this review article, we present suggestions that can lead to improved efficiency and use of hexaferrites in industry as adsorbents.