Mössbauer study of amorphous and nanocrystalline Fe-Nb-B alloys

K. Suzuki, J. M. Cadogan, V. Sahajwalla, A. Inoue, T. Masumoto

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Abstract

Curie temperature (Tc) and hyperfine interactions of the amorphous phase in melt-quenched Fe86-xNbxB14 (x=0, 2, 4 and 6) alloys in an as quenched state and after primary crystallisation were studied by means of thermo-magnetic analysis and 57Fe Mössbauer spectroscopy. Tc of the amorphous phase increased with the enrichment of B during primary crystallisation. The Tc decreased with the Nb content x and the hyperfine-field distribution of the residual amorphous phase for the x=6 sample after primary crystallisation showed the presence of a nonmagnetic component. These results suggest that B promotes the intergranular magnetic coupling whereas Nb reduces it. Since Nb plays an important role in the nano-structural formation, the combination of B and Nb is essential for obtaining the nano-structure with good magnetic softness.

Original languageEnglish
Pages (from-to)707-712
Number of pages6
JournalMaterials Science Forum
Volume225-227
Issue numberPART 2
Publication statusPublished - 1 Dec 1996
Externally publishedYes

Keywords

  • Amorphous Phase
  • Crystallisation
  • Curie Temperature
  • Fe-B
  • Fe-Nb-B
  • Mössbauer Effect
  • Nanocrystalline Soft Magnetic Alloys

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