Hard Magnetic Properties of Fe-Nd-B Alloys Containing Intergranular Amorphous Phase

Akihisa Inoue, Akira Takeuchi, Tsuyoshi Masumoto, Akihiro Makino

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41 Citations (Scopus)


Fe-rich Fe-Nd-B amorphous alloys containing 88 to 90 at% Fe annealed for 60–300 s at 923–1023 K have the nanostructure consisting of bcc-Fe, Fe14Nd2B and remaining amorphous phases, and exhibit rather good hard magnetic properties, i.e., remanence (Br) of 1.28 T, coercive field (iHc) of 252 kA/m and maximum energy product ((BH)max) of 146 kJ/m3 for Fe89Nd7B4. The nanoscale Fe14Nd2B particles with a size of about 30 nm are surrounded by the bcc-Fe and amorphous phases which act as a magnetic exchange-coupled medium. The nanoscale coexistence of the three ferromagnetic phases is important for the achievement of the rather good hard magnetic properties. The simultaneous achievement of the high Br and (BH)max values and the residual existence of the amorphous phase for the Fe-rich alloys containing about 90 at% Fe has significant engineering importance because of the expectations of high deformability and low cost.

Original languageEnglish
Pages (from-to)3626-3628
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 1995 Nov
Externally publishedYes

ASJC Scopus subject areas

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


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