Broadband and Tunable Microwave Absorption Properties from Large Magnetic Loss in Ni–Zn Ferrite

Subrata Ghosh, Shweta Sharma, Wenjie Li, Amin Nozariasbmarz, Lavanya Raman, Na Liu, Gagan K. Goyal, Yu Zhang, Steven E. Perini, Michael Lanagan, Shashank Priya, Bed Poudel

Research output: Contribution to journalArticlepeer-review


Highly effective electromagnetic (EM) wave absorber materials with strong reflection loss (RL) and a wide absorption bandwidth (EBW) in gigahertz (GHz) frequencies are crucial for advanced wireless applications and portable electronics. Traditional microwave absorbers lack magnetic loss and struggle with impedance matching, while ferrites are stable, exhibit excellent magnetic and dielectric losses, and offer better impedance matching. However, achieving the desired EBW in ferrites remains a challenge, necessitating further composition design. In this study, impedance matching is successfully enhanced and EBW in Ni–Zn ferrite is broadened by successive doping with Mn and Co, without incorporation of any polymer filler. It is found that Ni0.4Co0.1Zn0.5Fe1.9Mn0.1O4 material exhibits exceptional EM wave absorption, with a maximum RL of −48.7 dB. It also featured a significant EBW of 10.8 GHz, maintaining a 90% absorption rate (RL < −10 dB) for a thickness of 4.5 mm. These outstanding properties result from substantial magnetic losses and favorable impedance matching. These findings represent a significant step forward in the development of microwave absorber materials, addressing EM wave pollution concerns within GHz frequencies, including the frequency band used in popular 5G technology.

Original languageEnglish (US)
Article number2301857
JournalAdvanced Materials Technologies
Issue number6
StatePublished - Mar 18 2024

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering

Cite this