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

Kazuhisa Sato, Yoshihiko Hirotsu

    研究成果: Conference article査読

    10 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ページ(範囲)1497-1499
    ページ数3
    ジャーナルJournal of Magnetism and Magnetic Materials
    272-276
    DOI
    出版ステータスPublished - 2004 5月
    イベントProceedings of the International Conference on Magnetism - Rome, Italy
    継続期間: 2003 7月 272003 8月 1

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学

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