Magnetic nanoparticles: When atoms move around

Kazuhisa Sato

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    The degree of atomic ordering in magnetic nanoparticles decreases strongly with the particles size is discussed. Excellent magnetic properties, a high-temperature annealing step is required to recover the atomic order. The researchers annealed disordered Fe (Co) or Pt (Pd) atoms (CoPt) nanoparticles at 500 °C for up to a maximum of 16 hour. When the nanoparticles become smaller, coordination at the surface is progressively reduced. The continuous disordering has been attributed to the surface-induced disorder related to platinum segregation onto the particle surface. It also presents some fresh perspectives for designing nanoparticles for industrial applications, such as ultrahigh-density magnetic-storage media.

    Original languageEnglish
    Pages (from-to)924-925
    Number of pages2
    JournalNature Materials
    Volume8
    Issue number12
    DOIs
    Publication statusPublished - 2009 Dec

    ASJC Scopus subject areas

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

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