Fabrication of (Co 1-xFe x)-B particles with magnetic softness

Y. Shimada, Y. Endo, M. Yamaguchi, S. Okamoto, O. Kitakami

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3 Citations (Scopus)


Amorphous Co xFe 1-x-B particles with magnetic softness were fabricated by chemical reduction of metal ions. Fabrication conditions to obtain particles with good magnetic softness are described. Co xFe 1-x-B particles with x= 0.90-0.95 exhibit superb softness because of their nearly zero-magnetostrictive property. The soft properties of the particles are thermally stable compared to other compositions such as Fe-B-P or Co 50 Fe 50 -B. Chains of Co xFe 1-x-B particles with x=0.95 produced in a magnetic field were studied in detail. The high permeability feature associated with the high aspect ratio of the chain shape exhibits only a slight change after annealing up to 400 degrees. The frequency dispersion of initial permeability exhibits two resonance peaks that are ascribed to the shape anisotropy of the chains.

Original languageEnglish
Article number6332612
Pages (from-to)2903-2906
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 2012


  • Amorphous particles
  • initial permeability
  • magnetic softness
  • particle chain
  • spin resonance
  • thermal stability


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