High-resolution transmission electron microscopy analysis of L10 ordering process in Fe/Pd thin layers
High-resolution transmission electron microscopy analysis of L10 ordering process in Fe/Pd thin layers
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DOI：
10.1063/1.2826632
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发表时间：
2007-12
影响因子：
3.2
通讯作者：
A. Kovács;Kazuhisa Sato;Y. Hirotsu
中科院分区：
文献类型：
--
作者：
A. Kovács;Kazuhisa Sato;Y. Hirotsu
用透射电镜原位退火研究了MgO（001）衬底上制备的Pd和Fe双层薄膜中硬磁L10有序相的形成。沉积态Fe/Pd和Pd/MgO界面的结构用高分辨透射电子显微镜进行了表征。在673 K时，Fe和Pd层快速混合，合金化区域内立即形成L10相。高分辨率的观察表明，有序区域的L10-FePd相形成在分散的区域没有预定的成核位置。在773 K时，生长的有序区域偶尔在相邻部分之间形成反相边界。有序的L10-FePd薄层含有平移结构域，其四轴垂直于基底。
The hard magnetic L10 ordered phase formation in thin Pd and Fe bilayers prepared on MgO (001) substrate has been investigated by transmission electron microscopy using in situ annealing. The structures of as-deposited Fe/Pd and Pd/MgO interfaces were characterized by high-resolution transmission electron microscopy. Fast intermixing of Fe and Pd layers and immediate L10 phase formation within the alloyed area was found at 673 K. The high-resolution observations indicated that the ordered region of the L10-FePd phase was formed in dispersed areas without a predetermined nucleation site. At 773 K, the growing ordered areas occasionally formed antiphase boundaries between the adjacent parts. The ordered L10-FePd thin layer contained translational domains with tetragonal c axis perpendicular to the substrate.