Hiraga K, Ohsuna T, Kawasaki M
Institute for Materials Research, Tohoku University, Sendai, Japan.
J Electron Microsc (Tokyo). 2000;49(6):729-33. doi: 10.1093/oxfordjournals.jmicro.a023865.
A modulated structure based on an Al3Pd structure in an Al70Co25Pd5 alloy has been studied by atomic-scale observations with high-resolution transmission electron microscopy (HREM) and high-angle annular detector dark-field (HAADF) technique using a scanning transmission electron microscope. From the electron microscopy observations, we can reveal an arrangement of atom columnar clusters, which produces peculiar shifts of diffraction spots in an electron diffraction pattern. Arrangements of transition-metal atoms in defect regions in the modulated structure are proposed from the observed HAADF image.
利用扫描透射电子显微镜的高分辨率透射电子显微镜（HREM）和高角度环形探测器暗场（HAADF）技术，通过原子尺度观察研究了Al70Co25Pd5合金中基于Al3Pd结构的调制结构。从电子显微镜观察中，我们可以揭示原子柱状簇的排列，这会在电子衍射图案中产生特殊的衍射斑点位移。根据观察到的HAADF图像，提出了调制结构中缺陷区域过渡金属原子的排列方式。
