Tailoring of Electromagnetic Absorption in Substituted Hexaferrites from 8.2 GHz to 12.4 GHz

• Published in: Journal of electronic materials 2020-03, Vol.49 (3), p.1646-1653
• Main Authors: Kaur, Harsimrat, Marwaha, Anupma, Singh, Charanjeet, Narang, Sukhleen Bindra, Jotania, Rajshree, Bai, Yang, Mishra, Sanjay R., Singh, Dharmendra, Sombra, A.S.B., Ghimire, Madhav, Dhruv, Preksha
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Composition; Electromagnetic absorption; Electromagnetic interference; Electronics and Microelectronics; Ferrites; Impedance matching; Instrumentation; Materials Science; Microwave absorbers; Optical and Electronic Materials; Progress and Challenges in Developing Electromagnetic Interference Materials; Solid State Physics; Thickness
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-019-07498-8

Microwave absorbers are an important topic of interest to mitigate electromagnetic interference. Here, we have investigated electromagnetic absorption properties of Ba 0.5 Sr 0.5 Co x In x Fe 12−2 x O 19 hexaferrite prepared by the conventional ceramic method. M-type hexagonal structure in the compositions was confirmed from x-ray diffraction analysis. The role of Co 2+ and In 3+ , thickness of composition and frequency on the electromagnetic absorption in the ferrite compositions has been explored from 8.2 GHz to 12.4 GHz. It was found that both Co 2+ -In 3+ increased microwave/electromagnetic absorption with broad bandwidth, decreased the thickness and enhanced impedance matching. The reflection loss of −39.99 dB was noted in the composition x  = 0.2 for the thickness of 1.6 mm and a frequency of 11.14 GHz. The results conclude that investigated compositions of Ba 0.5 Sr 0.5 Co x In x Fe 12−2 x O 19 ferrite ameliorate absorber applications.