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.
|ジャーナル||Journal of Magnetism and Magnetic Materials|
|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 27 → 2003 8月 1
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