کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5411313 1506571 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electric field induced transformations and dielectric properties of ferrielectric smectic phase
ترجمه فارسی عنوان
تحولات الکتریکی ناشی از الکتریسیته و خواص دی الکتریک فاز فریم الکتریک
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Some of the antiferroelectric liquid crystal compounds (C12HH, C12F3 and MHPOBC) displaying ferrielectric phase are investigated. In a planar sample the ferrielectric (SmC*FI1) existing between the ferroelectric (SmC*) and the anticlinic (SmC*A) phases is suppressed due to an anchoring surface. In this configuration, we report the first observation of this phase by heating. Therefore, its properties are studied by dielectric, electro-optic and microscopic techniques. The experiments, mentioned above, suggest that SmC*A-SmC*FI1 transition is first order. The electric-temperature (E-T) phase diagram of the C12HH compound including the existence of induced intermediate phase is well established experimentally. At the same time, the electric-concentration (E-x) phase diagram is also determined in the intermediate phase of the mixtures formed from the enantiomers of the MHPOBC compound. This phase diagram shows a significant concentration dependence of induced phase stability and unwinding threshold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 199, November 2014, Pages 162-166
نویسندگان
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