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Electromagnetic wave absorption characteristics in Ni-Mn-Zn Ferrite with varying Mn content and applied magnetic field

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2023, 33(6), pp.294-302
  • DOI : 10.6111/JKCGCT.2023.33.6.294
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : November 17, 2023
  • Accepted : November 30, 2023
  • Published : December 31, 2023

Ji-Hye Lee 1 LEE SANG MIN 2 Kang Young-Min 2

1한국교통대학교 에너지소재공학전공
2한국교통대학교

Accredited

ABSTRACT

Ni-Mn-Zn ferrite, Ni0.5-xMnxZn0.5Fe2O4 (0 ≤ x ≤ 0.5), was synthesized using the sol-gel method to investigate the crystal structure, microstructure, magnetic properties, high-frequency characteristics, and electromagnetic (EM) wave absorption characteristics as a function of Mn substitution. As the Mn content increased, a continuous decrease in saturation magnetization (MS) was observed with little change in coercivity (HC). Samples for each composition (x) exhibited strong EM wave absorption performance with first and second strong EM wave absorption regions satisfying minimum reflection loss, RLmin < -40 dB in the 1.5–2.5, 6–11 GHz range, respectively. The EM wave absorption in Ni-Mn-Zn ferrite depends on magnetic loss, and adjusting μʹ and μʺ spectra by Mn substitution or H field allows control of the EM wave absorption frequency.

Citation status

* References for papers published after 2023 are currently being built.

This paper was written with support from the National Research Foundation of Korea.