کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1816018 | 1525261 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, electro-optical and dielectric characterizations of ferroelectric liquid crystals showing the SmC*-SmA*-N* phase sequence
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Structural (helical pitch), electro-optical (tilt angle, spontaneous polarization and response time) and dielectric (Goldstone mode) characterizations have been performed on two pure ferroelectric liquid crystals of a biphenyl alkyloxy benzoate series and they show the N*-SmA*-SmC* phase sequence. The different results are discussed: the helical pitch, the spontaneous polarization and the rotational viscosity which is determined as a function of temperature by two methods using electro-optical or dielectric measurements. An Arrhenius behaviour of the rotational viscosity is found for the two compounds. The corresponding activation energies are determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 390, Issues 1â2, 1 March 2007, Pages 34-39
Journal: Physica B: Condensed Matter - Volume 390, Issues 1â2, 1 March 2007, Pages 34-39
نویسندگان
J. Hemine, C. Legrand, N. Isaert, A. El Kaaouachi, H.T. Nguyen,