Magnetoanisotropy, long-range order parameter and thermal stability of isolated L10 FePt nanoparticles with mutual fixed orientation

Kazuhisa Sato, Yoshihiko Hirotsu

    Research output: Contribution to journalConference article

    9 Citations (Scopus)

    Abstract

    Oriented L10-FePt nanoparticles with mean sizes as small as 12nm have been fabricated by electron beam evaporation. Atomic order parameter evaluated was as low as 0.55±0.02 in spite of the long-time annealing as long as 86.4ks at 873K. Magnetoanisotropy constant was estimated to be 1.2-1.4×106J/m3, which was much smaller than that of bulk FePt. Residual magnetization showed a decay of about 3-4% at 300K. The relatively small values of magnetoanisotropy are closely related to the small order parameter, and thought to be responsible for residual magnetization decay at 300K.

    Original languageEnglish
    Pages (from-to)1497-1499
    Number of pages3
    JournalJournal of Magnetism and Magnetic Materials
    Volume272-276
    DOIs
    Publication statusPublished - 2004 May 1
    EventProceedings of the International Conference on Magnetism - Rome, Italy
    Duration: 2003 Jul 272003 Aug 1

    Keywords

    • FePt
    • Magnetoanisotropy
    • Nanoparticle
    • Order parameter
    • Orientation

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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