Soft magnetic properties of bcc fe-m-b-cu (M=ti, nb or ta) alloys with nanoscale grain size

Kiyonori Suzuki, Akihiro Makino, Akihisa Inoue, Tsuyoshi Masumoto

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The changes in microstructure and magnetic properties upon crystallization were investigated for melt-spun amorphous Fe-M-B-Cu (M = Ti, Nb or Ta) quaternary alloys. A mostly single bcc phase with nanoscale grain size of about 10 nm was formed by annealing the amorphous Fe-M-B-Cu alloys for 3.6 ks in the range of 750 to 950 K. The crystallization-induced bcc alloys were found to exhibit a high permeability (/¿e) of from 10000 to 20000 at 1 kHz, combined with a high saturation magnetization (Bs) of from 1.40 to 1.55 T. These values are superior to those for amorphous Fe-Si-B alloys which are a known soft magnetic material with high Bs.

Original languageEnglish
Pages (from-to)L1729-L1732
JournalJapanese Journal of Applied Physics
Issue number10A
Publication statusPublished - 1 Jan 1991
Externally publishedYes


  • Amorphous phase
  • Bcc phase
  • Crystallization
  • High saturation magnetization
  • Nanocrystalline structure
  • Soft magnetic property

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