کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1811017 | 1025577 | 2012 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic and bias field investigation of an antiferroelectric liquid crystal
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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
Dielectric spectroscopy of an antiferroelectric liquid crystal material (S)-4-(1-methylheptyloxycarbonyl)phenyl-4â²-(6-pentanoyloxyhex-1-oxy)biphenyl-4-carboxylate 4H6Bi(S) for its helical phases has been carried out under bias electric field in the frequency range 0.1Â Hz-10Â MHz. Bias field investigation has been carried out in order to explore new relaxation modes. Dielectric characterization of the material, when carried out as a function of DC bias, reveals soft mode around 350Â kHz and domain mode at â¼100Â Hz in the SmCâ phase as a consequence of suppression of Goldstone mode due to helix unwinding. In the SmCâA phase a field induced new relaxation mode has been investigated at 8.0Â kV/cm having relaxation frequency from 100Â Hz to 600Â Hz with increasing bias electric field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 407, Issue 1, 1 January 2012, Pages 90-95
Journal: Physica B: Condensed Matter - Volume 407, Issue 1, 1 January 2012, Pages 90-95
نویسندگان
Suman Kumari, I.M.L. Das, R. Dabrowski,