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Dielectric and electro-optical studies of glycerol/ferroelectric liquid crystal mixture at room temperature
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10.1063/1.3149781
/content/aip/journal/jap/105/12/10.1063/1.3149781
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3149781
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Dielectric permittivity at 0 V (curve 1), 10 V (curve 2), and again at 0 V (curve 3) and (b) dielectric loss factor as a function of log of frequency of pure glycerol at room temperature.

Image of FIG. 2.
FIG. 2.

(a) Dielectric permittivity and (b) dielectric loss factor as a function of log of frequency of pure DHFLC and glycerol/DHFLC at room temperature. Cole-Cole plots of (c) pure DHFLC and (d) glycerol/DHFLC mixture at room temperature. The value of distribution parameters and dielectric relaxation times has been indicated in the figure. The subscripts 1 and 2 in part (d) indicate the Goldstone mode and mode due to glycerol, respectively.

Image of FIG. 3.
FIG. 3.

(a) Dielectric permittivity and (b) dielectric loss factor as a function of log of frequency of pure FLC and glycerol/FLC at room temperature.

Image of FIG. 4.
FIG. 4.

Dielectric permittivity as a function of log of frequency at 0 V (curve 1), 10 V (curve 2), and again at 0 V (curve 3) of glycerol/DHFLC mixture at room temperature.

Image of FIG. 5.
FIG. 5.

Electrical response of glycerol/DHFLC mixture at room temperature in memory cell at 20 V at (a) 200 mHz (Ch 1: 10 V/div, Ch 2: 0.10 V/div, time: 1 s), (b) 1 Hz (Ch 1: 10 V/div, Ch 2: 0.20 V/div, time: 200 ms), (c) 10 Hz (Ch 1: 10 V/div, Ch 2: 1 V/div, time: 20 ms), and (d) 50 Hz (Ch 1: 10 V/div, Ch 2: 2 V/div, time: 5 ms). Ch 1 shows driving triangular voltage and Ch 2 shows its electrical response. The time scale per division is on -axis.

Image of FIG. 6.
FIG. 6.

Optical response of glycerol/DHFLC mixture at room temperature in memory cell at 20 V at (a) 200 mHz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 1 s), (b) 1 Hz (Ch 1: 10 V/div, Ch 2: 0.002 V/div, time: 200 ms), (c) 10 Hz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 20 ms), and (d) 50 Hz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 5 ms). Ch 1 shows driving time delayed square voltage and Ch 2 shows its optical response. The time scale per division is on -axis

Image of FIG. 7.
FIG. 7.

Optical micrographs of glycerol/DHFLC mixture memory cell at room temperature at (a) 0 V, (b) 15 V bias, (c) after 12 h of removal of bias, and (d) again at 0 V. Scale bar: 0.2 mm. The cross arrows have been shown to indicate crossed polarizers.

Image of FIG. 8.
FIG. 8.

Behavior of (a) rotational viscosity, (b) spontaneous polarization, and (c) response time with applied voltage for glycerol/DHFLC mixture at room temperature.

Image of FIG. 9.
FIG. 9.

Dielectric permittivity as a function of log of frequency at 0 V (curve 1), 10 V (curve 2), and again at 0 V (curve 3) of glycerol/FLC mixture at room temperature.

Image of FIG. 10.
FIG. 10.

Optical response of glycerol/FLC mixture at room temperature in memory cell at 20 V at (a) 200 mHz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 1 s), (b) 1 Hz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 200 ms), (c) 10 Hz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 20 ms), and (d) 50 Hz (Ch 1: 10 V/div, Ch 2: 0.020 V/div, time: 5 ms). Ch 1 shows driving time delayed square voltage and Ch 2 shows its optical response. The time scale per division is on -axis

Image of FIG. 11.
FIG. 11.

Optical micrographs of glycerol/FLC mixture memory cell at room temperature at (a) 0 V, (b) 15 V bias, (c) after 5 min of removal of bias, and (d) again at 0 V. Scale bar: 0.2 mm. The cross arrows have been shown to indicate crossed polarizers.

Image of FIG. 12.
FIG. 12.

Behavior of (a) rotational viscosity, (b) spontaneous polarization, and (c) response time with applied voltage for glycerol/FLC mixture at room temperature.

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/content/aip/journal/jap/105/12/10.1063/1.3149781
2009-06-17
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dielectric and electro-optical studies of glycerol/ferroelectric liquid crystal mixture at room temperature
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3149781
10.1063/1.3149781
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