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

被引：0

作者：

Sato, Kazuhisa ^{[1
]}

Hirotsu, Yoshihiko ^{[1
]}

机构：

[1] Inst. of Sci./Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan

来源：

Journal of Magnetism and Magnetic Materials | 2004年 / 272-276卷

关键词：

Annealing - Coercive force - Magnetic anisotropy - Magnetic recording - Magnetization - Nanostructured materials - SQUIDs - Transmission electron microscopy;

D O I：

10.1016/j.jmmm.2003.12.1044

中图分类号：

学科分类号：

摘要：

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. © 2003 Elsevier B.V. All rights reserved.

引用

页码：1497 / 1499

共 30 条

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