{"title":"AC electric field induced flow and helix unwinding in focal conic texture of smectic C* liquid crystal","authors":"B. Labroo, V. Razdan, D. Parmar, G. Durand","doi":"10.1051/JPHYSLET:0198500460240117700","DOIUrl":null,"url":null,"abstract":"A thin (∼10 μm) focal conic texture of DOBAMBC in its SmC * phase is submitted to an AC electric field. Above a field threshold, a DC plug flow of the texture normal to the layers is observed. It always originates from the focus of the ellipses towards their centre and extends to the entire focal domain. At higher field, the associated viscous shear unwinds the helical texture. The flow thresholds is explained by the build up at the focus of a DC electric pressure, from the action of the AC field on AC space charges, generated by conductivity anisotropy Etude sur le DOBAMBC. Observation d'un ecoulement permanent bouchon au-dela d'un certain seuil","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"242 ","pages":"1177-1181"},"PeriodicalIF":0.0000,"publicationDate":"1985-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal De Physique Lettres","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/JPHYSLET:0198500460240117700","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
A thin (∼10 μm) focal conic texture of DOBAMBC in its SmC * phase is submitted to an AC electric field. Above a field threshold, a DC plug flow of the texture normal to the layers is observed. It always originates from the focus of the ellipses towards their centre and extends to the entire focal domain. At higher field, the associated viscous shear unwinds the helical texture. The flow thresholds is explained by the build up at the focus of a DC electric pressure, from the action of the AC field on AC space charges, generated by conductivity anisotropy Etude sur le DOBAMBC. Observation d'un ecoulement permanent bouchon au-dela d'un certain seuil
在交流电场作用下，DOBAMBC在其SmC *相中形成薄(~ 10 μm)的焦锥形织构。在场阈值以上，观察到纹理垂直于层的直流插头流。它总是从椭圆对中心的焦点开始，并延伸到整个焦点区域。在较高的电场下，相关的粘性剪切会解开螺旋结构。流动阈值的解释是，由电导率各向异性Etude sur le DOBAMBC产生的交流场对交流空间电荷的作用产生的直流电压力的焦点。观察法规定，在某一特定场合，要有永久的自由
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