Superparamagnetic Relaxation in Nanocrystalline Fe80Zr7B12Cu1 Alloys

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Nanocrystalline Fe80Zr7B12Cu1 alloys with different amounts and sizes of bcc precipitates were prepared by appropriate annealing of amorphous ribbons. The 6–10 nm ferromagnetic bcc granules are embedded in a residual amorphous tissue with a thickness at least 4 nm. Above room temperature superparamagnetic relaxation characteristic for small magnetic particles was observed with increasing temperature, as indicated by a significant increase in the width of the Mössbauer lines belonging to the bcc precipitates. It shows the absence of magnetic coupling which is stronger than the dipole-dipole interaction between the ferromagnetic nanoparticles.

Original languageEnglish
Pages (from-to)175-179
Number of pages5
JournalHyperfine Interactions
Issue number1-4
Publication statusPublished - Jun 28 2002


  • magnetic coupling
  • nanocrystal
  • superparamagnetic relaxation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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