scholarly journals Dielectric response of electric-field distortions of the twist-bend nematic phase for LC dimers

2019 ◽  
Vol 151 (11) ◽  
pp. 114908 ◽  
Author(s):  
K. Merkel ◽  
C. Welch ◽  
Z. Ahmed ◽  
W. Piecek ◽  
G. H. Mehl
Keyword(s):  
Electric Field ◽  
Dielectric Response ◽  
Nematic Phase

Giant Dielectric Response with an Electric Field in Charge-Ordered La1−xCaxMnO3Compounds

2009 ◽  
Vol 92 (6) ◽  
pp. 1366-1369 ◽  
Author(s):  
Ying Hou ◽  
Yiping Yao ◽  
Genqiang Zhang ◽  
Qingxuan Yu ◽  
Xiaoguang Li
Keyword(s):  
Electric Field ◽  
Dielectric Response ◽  
Giant Dielectric

Nonlinear Dielectric Response of Relaxor PMN-PZT Ceramics under DC Electric Field

2004 ◽  
Vol 307 (1) ◽  
pp. 151-159 ◽  
Author(s):  
S. A. GRIDNEV ◽  
A. A. GLAZUNOV ◽  
A. N. TSOTSORIN
Keyword(s):  
Electric Field ◽  
Dielectric Response ◽  
Pzt Ceramics ◽  
Nonlinear Dielectric ◽  
Dc Electric Field

Development of an Electrically Controllable Damper Using a Liquid Crystal

1996 ◽  
Vol 118 (3) ◽  
pp. 510-515 ◽  
Author(s):  
S. Morishita
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Molecular Orientation ◽  
Nematic Phase ◽  
Organic Liquid ◽  
Working Fluid ◽  
Damping Force ◽  
Electric Voltage ◽  
Electroviscous Effect ◽  
Display Devices

This paper describes a new electrically controllable damper that uses a liquid crystal (LC) as the working fluid. LC is a homogeneous organic liquid characterized by the long-range order of its molecular orientation. The sample LC used in this work is a thermotropic, low molecular-weight LC which appears in the nematic phase, and was originally developed for display devices. The molecular orientation of the nematic phase is characterized by slender ellipsoidal shape molecules, the main axis of which can be controlled by applying an electric or magnetic field. When an electric field is applied to a LC, the orientation order of the molecules becomes parallel to the applied electric field, causing the apparent viscosity to increase. This phenomenon is known as the electroviscous effect. To study the application of the electroviscous effect of a LC to a controllable mechanical damping device, a prototype controllable damper was constructed and its performance was examined. In this damper, a piston, equipped with several concentric cylindrical electrodes attached to the piston rod, moves in the liquid crystal. During the reciprocal movement of the electrodes, LC flow through the electrodes is controlled by applying electric voltage to the latter. Damper performance was investigated under various DC electric field strengths, piston oscillation amplitudes and frequencies. The results show that the controllable damping force was three times larger with the application of an electric field than that without, and that the range of force variation was kept at the same level regardless of the frequency and amplitude of piston motion.

Combined Real-Time Study of Dielectric Response and Piezoresponse of Pb(Mg1/3Nb2/3)O3 Relaxor in an Electric Field

2020 ◽  
Vol 62 (10) ◽  
pp. 1873-1879
Author(s):  
A. F. Vakulenko ◽  
S. B. Vakhrushev ◽  
E. Yu. Koroleva
Keyword(s):  
Electric Field ◽  
Real Time ◽  
Dielectric Response ◽  
Time Study

Achiral H-shaped liquid crystals exhibiting an electric-field-induced chiral nematic phase

2019 ◽  
Vol 7 (23) ◽  
pp. 6905-6913 ◽  
Author(s):  
Shoumi Sayama ◽  
Atsushi Yoshizawa
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Nematic Phase ◽  
Nematic Liquid Crystals ◽  
Chiral Nematic

Newly designed achiral H-shaped nematic liquid crystals exhibit an electric-field-induced chiral nematic phase showing domains with opposite helical senses.

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