Magnetism of AuFe nanoparticles

T. Taniyama, R. Ogawa, T. Sato, E. Ohta

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The time-dependent magnetization of Au81.7Fe18.3 nanoparticles was investigated under field-cooled and zero-field-cooled conditions. In the Au81.7Fe18.3 nanoparticles a spin-glass-like phase appears below 10 K; the field-cooled and zero-field-cooled magnetizations reach the upper bound value within about 1500 s. This is the first observation of the entire process of evolution from the non-equilibrium spin-glass-like state to the equilibrium state. This peculiar relaxation process in the Au81.7Fe18.3 nanoparticles may be interpreted by the decrease in characteristic relaxation time owing to simplification of the multi-valley structure of the free energy and/or a lowered energy barrier as a surface effect.

Original languageEnglish
Pages (from-to)319-321
Number of pages3
JournalMaterials Science and Engineering A
Volume217-218
DOIs
Publication statusPublished - 1996 Oct 30

Keywords

  • AuFe
  • Magnetism
  • Nanoparticles

ASJC Scopus subject areas

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

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