论文标题
光学反射率是一种简单的诊断方法，用于测试二十面体质晶体的结构质量
Optical reflectivity as a simple diagnostic method for testing structural quality of icosahedral quasicrystals
论文作者
论文摘要
光学反射率是一种简单的诊断方法，用于测试二十叶面准晶体的结构质量2使用光学反射仪，X射线衍射和传输电子显微镜，研究了基于AL和基于Ti的基于Al的准晶体和近似样品的光学反射率。使用三种不同的制备过程获得了不同的结构形态：烧结，脉冲激光沉积和反应性阴极磁控溅射。这项工作表明，二十面体状态在镜面反射率中的规范行为对微观结构的不同且非常细的方面极为敏感：小于50 nm的晶粒大小，轻微的局部弥漫性疾病，并远离二十面体晶体学结构（近似值）。这项工作解释了为什么在文献中发现的相同类型的准晶体的光学特性有时会揭示一个从一个作者到另一个作者的行为。该研究随后证实了一些作者的工作，肯定表明，二十二个状态在30000-50000 cm-1域中镜面反射率的规范行为的特征是逐步制造的功能降低。这也表明，可以通过Janot模型的群集层次结构来解释这种行为。
Optical reflectivity as a simple diagnostic method for testing structural quality of icosahedral quasicrystals 2 The optical reflectivity of Al-based and Ti-based quasicrystalline and approximant samples were investigated versus the quality of their structural morphology using optical reflectometry, X-ray diffraction and transmission electron microscopy. The different structural morphologies were obtained using three different preparation processes : sintering, pulsed laser deposition and reactive cathodic magnetron sputtering. The work demonstrates that the canonical behaviour of icosahedral state in specular reflectivity is extremely sensitive to different and very fine aspects of the microstructure : sizes of grains smaller than 50 nm, slight local diffuse disorder and shifts away from the icosahedral crystallographic structure (approximants). The work explains why the optical properties of the same kind of quasicrystals found in literature sometimes reveal a different behaviour from one author to another. The study then confirms the work of some authors and definitely shows that the canonical behaviour of icosahedral state in specular reflectivity over the 30000-50000 cm-1 domain is characterized by a decreasing function made of steps. It also shows that this behaviour can be interpreted thanks to the cluster hierarchy of the model of Janot.
