Low-temperature spin freezing in soft magnetic nanocrystalline alloys

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Low-temperature spin freezing was observed below 25K in the nanocrystalline (nc)-Fe92-xZr7BxCu1 (x=2-21at%) alloys prepared from their amorphous precursors by various heat treatments. The freezing causes magnetic hardening with increasing B concentration and annealing temperature, shown by the temperature dependence of both the susceptibility and coercive field. The phenomenon is attributed to the gradual magnetic blocking of a fraction of nanocrystals decoupled from the ferromagnetic matrix. Similar effects are observed in a Cr-containing FINEMET-type nc alloy.

Original languageEnglish
Pages (from-to)483-485
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume254-255
DOIs
Publication statusPublished - Jan 1 2003
EventSMM15 - Bilbao, Spain
Duration: Sep 5 2001Sep 7 2001

Keywords

  • Magnetic blocking
  • Magnetic clusters
  • Magnetic hardness
  • Nanocrystalline materials
  • Spin freezing
  • Superparamagnetism

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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