Low-loss composite material containing fine Zn-Ni-Fe flakes for high-frequency applications

Yasushi Shirakata, Nobuhiro Hidaka, Masayuki Ishitsuka, Akinobu Teramoto, Tadahiro Ohmi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A low-loss magnetic composite material consisting of Zn5Ni 75Fe20 fine flakes dispersed in a polymer has been developed for miniaturization and performance improvement of high-frequency devices. Fine flakes are produced by a new mixing procedure that prevents cohesion of particles, thereby enhancing the dispersibility of the particles. The complex relative permeabilities of the developed material areμ' = 2.4,μ" = 0.09, and tanσ δμ(= μ"/μ') = 0.04 at 1 GHz. The low-loss properties of the developed magnetic composite material are confirmed by measured and simulated results of the basic characteristics of a small helical antenna loaded with the developed material.

Original languageEnglish
Article number5257350
Pages (from-to)4337-4340
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2009 Oct
Externally publishedYes


  • Antennas
  • High frequency
  • Magnetic loss
  • Permeability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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