Hard Magnetic Properties of (001) Oriented L10-FePd Nanoparticles Formed at 773 K
Hard Magnetic Properties of (001) Oriented L10-FePd Nanoparticles Formed at 773 K
复制标题
773 K 下形成的 (001) 取向 L10-FePd 纳米颗粒的硬磁性能
DOI：
10.1143/jjap.39.l1121
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发表时间：
2000
影响因子：
1.5
通讯作者：
Y. Hirotsu
中科院分区：
文献类型：
--
作者：
Kazuhisa Sato;B. Bian;Y. Hirotsu
用电子束蒸发技术在相同的条件下制备了二维分散的10 nm尺寸的Fe/Pd和Fe/Pt颗粒(纳米颗粒)。773K以上的热处理形成了尺寸为10 nm的L10型(CuAu I型)FEPD和FePt有序合金颗粒。对于FePt纳米粒子，在873K时矫顽力开始增加，而对于FEPD纳米粒子，在773K时，它们的c轴垂直于薄膜平面，在773K下热处理1h后，垂直于薄膜平面的矫顽力高达1.2Koe。这种方法可以用于在低温下制备L10结构形成的超高密度磁光或垂直记录介质，特别是在Fe-Pd系统中。
Two-dimensionally dispersed 10 nm-sized Fe/Pd and Fe/Pt particles (nanoparticles) with orientations have been fabricated with the same condition using an electron-beam evaporation technique. Heat treatments at temperatures above 773 K lead to a formation of L10-type (CuAu I-type) FePd and FePt ordered alloy particles with sizes as small as 10 nm. In the case of FePt nanoparticles, coercivity started to increase at 873 K, while in the case of FePd at 773 K. Moreover, in most of the FePd nanoparticles, their c-axes oriented normal to the film plane and the perpendicular coercivity reached as high as 1.2 kOe after annealing at 773 K for 1 h. This method can be applied to fabricate ultra-high density magneto-optical or vertical recording media under low annealing temperatures for the L10-structure formation especially in the Fe-Pd system.