Superparamagnetic behaviour of Fe80B12Zr7Cu alloys with different fractions of primary nanocrystalline phase

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Abstract

The superparamagnetic behaviour of nanocrystalline (nc) Fe80B12Zr7Cu alloys, having different amounts of body centred cubic (bcc) fraction controlled by DSC heat treatments was studied by high temperature SQUID magnetometry and Mössbauer spectroscopy. The granule diameter calculated from magnetic measurements is significantly higher than the X-ray determined grain size but is proportional to that value. The superparamagnetic behaviour is observed at substantially lower temperatures by the Mössbauer spectroscopy than by the macroscopic magnetisation studies, which means that the applied magnetic field significantly influences the superparamagnetic behaviour.

Original languageEnglish
Pages (from-to)219-222
Number of pages4
JournalMaterials Science and Engineering A
Volume375-377
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Jul 1 2004

Keywords

  • Magnetic properties
  • Mössbauer study
  • Nanocrystal
  • Superparamagnetic relaxation

ASJC Scopus subject areas

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

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