Structural and magnetic properties of metastable Fe1-xSix (0.15 < x < 0.34) alloys prepared by a rapid-quenching technique

L. K. Varga, F. Mazaleyrat, J. Kovac, J. M. Greneche

Research output: Article

38 Citations (Scopus)

Abstract

Fe1-xSix (0.15 < x < 0.375) alloys have been prepared by a rapid-quenching technique. X-ray diffraction patterns show that these alloys consist of submicron grains between 100 and 300 nm. The DO3 cubic symmetry could be obtained for Si content up to 34 at.% Si. This feature is particularly interesting since alloys containing more than 26 at.% Si and cast with usual techniques consist of a mixture of Fe3Si and Fe5Si3. The magnetization, Curie temperature and resistivity data for these fine-grained alloys are consistent with those for bulk alloys for Si content below 25 at.% Si. In contrast, the structural and physical data for single-Phase alloys with 28-34 silicon content are reported for the first time. Within this composition range, the magnetization and Curie point values roughly correspond to those suggested by the extrapolation of existing data. However, the resistivity shows an unexpected marked increase above 25 at.% Si. The values of resistivity, magnetization and effective anisotropy of soft-magnetic nanocrystalline Fe2Si are found to be 200 μΩ cm, 0.6 T and 15 kJ m-3 respectively, suggesting that this alloy has potential for high-frequency applications.

Original languageEnglish
Pages (from-to)1985-2000
Number of pages16
JournalJournal of Physics Condensed Matter
Volume14
Issue number8
DOIs
Publication statusPublished - márc. 4 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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