https://doi.org/10.1140/epjp/s13360-023-04451-x
Regular Article
Electric–magnetic synergism in BaTiO3-magnetic microwire/silicone rubber composites for enhanced microwave and electromagnetic shielding tunability
1
Ningbo Innovation Center, Zhejiang University, 1 South Qianhu Road, 315100, Ningbo, People’s Republic of China
2
Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, 310027, Hangzhou, People’s Republic of China
3
Physics Department, Faculty of Science, Tanta University, Al-Geish St., 31527, Tanta, Egypt
c
elshshtawy@science.tanta.edu.eg
Received:
14
June
2023
Accepted:
8
September
2023
Published online:
19
September
2023
Barium titanate (BT) is a well-known electroceramic attractive for microwave applications owing to its exceptional ferroelectric characteristics, elevated dielectric constant, and piezoelectricity. BT is usually blended with conductive/magnetic fillers (mostly 0D and 3D micro/nanostructures) to better tailor its electromagnetic properties based on synergistic effects. However, complex synthesis, filler agglomeration, and high ceramic filler concentration inevitably lead to flexibility degradation, limiting its application in modern electronics. Here, we exploit magnetoelectric coupling effects in which ferroelectricity and ferromagnetism coexist to modulate the shielding properties of BT/silicone rubber composites via incorporating ferromagnetic microwires. The high dielectric constant of BT and electric hysteresis effects contributed to microwave attenuation. At the same time, its piezoelectricity modified the wire’s magnetic anisotropy via interfacial strain. In turn, the microwires promoted magnetic losses mainly by ferromagnetic resonance and magnetic hysteresis while also affecting dipole rotation in BT via wire–wire-dipolar magnetic interaction. The efficient synergism between the fillers resulted in enhanced transmission and shielding tunability, reaching a maximum shielding of 16 dB at 9.5 GHz for composites incorporating 30 wt.% BT and six microwires (0.0126 vol%) compared to 2.26 dB for composites with merely BT. Moreover, benefiting from the elastomer matrix and low filler content, these composites have potential in flexible electronics. At the same time, it also constitutes a platform for designing shielding materials based on ferroelectric/ferromagnetic heterostructures.
D. Estevez, A. Uddin are equally contributed.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjp/s13360-023-04451-x.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
