Superparamagnetic Relaxation in Nanocrystalline Fe80Zr7B12Cu1 Alloys

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4 Citations (Scopus)

Abstract

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
Volume141-142
Issue number1-4
DOIs
Publication statusPublished - Jun 28 2002

Keywords

  • 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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