Chevron Layer Structure in the Smectic A Phase of 8CB
Chevron Layer Structure in the Smectic A Phase of 8CB
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8CB 近晶 A 相中的 V 形层结构
DOI：
10.1143/jjap.28.l487
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发表时间：
1989
影响因子：
1.5
通讯作者：
A. Fukuda
中科院分区：
文献类型：
--
作者：
Y. Takanishi;Y. Ouchi;H. Takezoe;A. Fukuda
通过 X 射线衍射分析研究了均匀排列的 8CB 液晶（厚度为 25 µm）的近晶 A 层结构。与普遍认识相反，首次发现，随着温度远离 N-SA 相变点，此类电池的局部层结构从书架结构转变为 V 形层结构。 V 形层结构的形成也可通过特征缺陷来识别：之字形缺陷表现为两个具有焦点圆锥的相对 V 形结构的边界。
The smectic A layer structure of a homogeneously aligned 8CB liquid crystal (25 µm in thickness) has been studied by X-ray diffraction analysis. Contrary to the common recognition, it is found, for the first time, that the local layer structure of this type of cell changes to a chevron layer structure from a book-shelf structure, as the temperature decreases away from the N-SA phase transition point. The formation of the chevron layer structure is also recognized by the characteristic defects: zig-zag defects appear as a boundary of two opposite chevron structures with focal conics.