Fe-rich soft magnetic FeSiBPCu hetero-amorphous alloys with high saturation magnetization

Men He, Liying Cui, Takeshi Kubota, Kunio Yubuta, Akihiro Makino, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Magnetic properties are perhaps the most remarkable and unique properties of Fe-based amorphous alloys. To obtain high saturation magnetization, high Fe content is preferred. However, there is a strict upper limit of Fe content for the formation of a single amorphous structure with good magnetic softness. Fe-based amorphous alloys with high Fe content over the limit have an as-quenched structure consisting of coarse a-Fe grains in an amorphous matrix, which inevitably results in inferior magnetic softness. We have studied the effect of P and/or Cu additions on the microstructure of Fe-based amorphous alloys with high Fe content. The α-Fe grain size and the coercivity (Hc) decrease by the simultaneously adding P and Cu. The Fe-rich FeSiBPCu alloys with the optimized composition have an extremely small α-Fe-like phase of about 3 nm or smaller in a diameter, exhibits the higher JS of about 1.67 T than that of the typical Fe-based amorphous alloy and show the low coercivity (Hc) of about 4 Am-1 in an as-quenched state.

Original languageEnglish
Pages (from-to)1330-1333
Number of pages4
JournalMaterials Transactions
Issue number6
Publication statusPublished - Jun 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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