L10 ordering at different stages of Fe0.5Pd0.5 epitaxial growth
L10 ordering at different stages of Fe0.5Pd0.5 epitaxial growth
复制标题
Fe0.5Pd0.5外延生长不同阶段的L10排序
DOI：
10.1063/1.1480483
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
D. Jalabert
中科院分区：
文献类型：
--
作者：
D. Halley;P. Auric;P. Bayle;B. Gilles;A. Marty;D. Jalabert
研究了在（001）Pd缓冲层上用分子束外延方法在620 K下生长的FePd层.在此生长温度下，预计会出现L10结构;我们比较了这些薄膜不同深度处的晶体有序性。57 Fe被用作原子尺度的局部探针，位于等摩尔FePd层内的不同位置。用穆斯堡尔谱研究了合金结构与薄膜磁各向异性的关系。没有观察到生长过程中L10有序性的可能降低。相反，L10结构的质量似乎得到改善，这由位于合金层的顶层上的铁原子的低近邻数所证实。还观察到富铁簇形成为横跨整个合金层的大的垂直缺陷;这些簇对应于膜内的化学无序区域。在缓冲界面，无序的，和稀释的铁合金（平均成分：Fe 0.25 Pd 0.75）与面内动量被识别…
FePd layers deposited by molecular beam epitaxy at 620 K on a (001) Pd buffer are investigated. At this growth temperature, an L10 structure is expected; we compare the crystal ordering at different depths in these thin films. 57Fe is used as a local probe at an atomic scale, located at different places within an equimolar FePd layer. The relationship between the alloy structure and the magnetic anisotropy of the films is investigated by Mossbauer spectroscopy. The possible decrease of the L10 ordering during growth is not observed. On the contrary, the quality of the L10 structure seems to improve, as confirmed by the low number of near-neighbors for iron atoms located on the top level of the alloy layer. Iron-rich clusters shaping into large vertical defects across the whole alloy layer are also observed; these clusters correspond to chemically disordered areas within the film. At the buffer interface, disordered, and dilute iron alloys (mean composition: Fe0.25 Pd0.75) with in-plane momenta are identif...