Irreversible magnetization in nickel nanoparticles

P. Zhang, F. Zuo, III K. Urban, A. Khabari, P. Griffiths, A. Hosseini-Tehrani

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

We report magnetic studies on nickel nanoparticle films of average particle size of 10nm. Magnetization as a function of field and temperature show that the system behaves like a random magnet with a strongly field-dependent irreversible temperature, below which the magnetization relax logarithmically with time. The effective barrier extrapolated increases strongly with temperature for a given field. The time dependence suggests the dominant dipole-dipole interaction in this magnetic nanoparticle system.

Original languageEnglish (US)
Pages (from-to)337-345
Number of pages9
JournalJournal of Magnetism and Magnetic Materials
Volume225
Issue number3
DOIs
StatePublished - 2001

Keywords

  • Dipolar interaction
  • Irreversible temperature
  • Magnetic relaxation
  • Magnetization
  • Nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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