Results 131 to 140 of about 685 (181)

Flexoelectric effect in a bent-core mesogen

Liquid Crystals, 2009
The flexoelectricity in a bent-core liquid crystal was evaluated quantitatively using two independent electrooptic methods. The absolute value of the bend flexoelectric coefficient e 3 was measured to be about 15.8 pC m−1. Our results revealed that there is little difference between the flexoelectricity of bent-core mesogens and that of conventional ...
Ken Ishikawa, Khoa V Le, Fumito Araoka
exaly   +2 more sources

Dynamic flexoelectric effect on piezoelectric nanostructures

European Journal of Mechanics, A/Solids, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiaoying Zhuang, Peter Wriggers, Timon Rabczuk   +2 more
exaly   +3 more sources

Surface polarization and flexoelectric effect

Journal of Applied Physics, 1991
In order to evaluate the order of magnitude and to establish the origin of the surface polarization, experimental investigations of direct piezoelectrical effect in nematic liquid crystals have been performed. The experimental setup used allows the temperature dependence of the electrical response of a nematic sample, submitted to periodic acoustic ...
BARBERO, GIOVANNI, A. P. KREKHOV, A. N. CHUVYROV, D. A. SCALDIN   +3 more
openaire   +2 more sources

On the flexoelectric effect in nematics

Liquid Crystals, 1997
Flexoelectricity is a general and fundamental phenomenon in liquid crystals. It describes the linear coupling between an applied electric field and gradients in the director field. Whereas flexoelectricity has for decades been regarded as only of academic interest, we think it is time to point out its considerable application potential, for instance in
P. RUDQUIST, S. T. LAGERWALL
openaire   +1 more source

Flexoelectric Effects in Cholesteric Liquid Crystals

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1997
Abstract We discuss flexoelectricity in cholesteric liquid crystals. In particular we point out that experimental results obtained by Patel and Meyer can be understood as surface effects. In addition we discuss similarities and differences between static and dynamic effects associated with flexoelectricity in cholesteric and nematic liquid crystals.
Brand, H., Pleiner, H.
openaire   +3 more sources

Flexoelectric effect in elastomers

2007
Electric polarization induced by a nonhomogeneous deformation field — flexoelectricity — has been investigated in elastomers. A simple model of dipole orientation mechanism controlled by anisotropic free volume is given. The order of magnitude of the polarization to the deformation gradient ratio β predicted by the model is β ∼ 10−11 C/m.
M. Marvan, A. Havránek
openaire   +1 more source

FLEXOELECTRIC EFFECT IN FERROELECTRICS

Functional Materials Letters, 2008
Flexoelectric effect and its influence on the application of multifunctional ferroelectrics have been investigated. Theory of flexoelectric coupling has indicated that mechanical strain gradient can impact polarization in a way analogous to electric field. Experimentally, magnitudes of the flexoelectric coefficients have been measured in ferroelectric,
openaire   +1 more source

Mathematical Modeling of Flexoelectric Effect

2018
To study the flexoelectric effect, a three-point excitation model for a piezoelectric element with a proof mass at its center was selected. This type of excitation occupies an “intermediate” place between cantilever- and stack-type PEGs. The axial action of the proof mass along the center of the plate leads to an elastic deflection (see Fig.
Sergey N. Shevtsov, Arkady N. Soloviev, Ivan A. Parinov, Alexander V. Cherpakov, Valery A. Chebanenko   +4 more
openaire   +1 more source

Flexoelectric aging effect in ferroelectric materials

Journal of Applied Physics, 2023
In spite of the flexoelectric effect being a universal phenomenon in the ferroelectric perovskites, the current understanding of flexoelectric aging in ferroelectrics is, actually, rather incomplete. In this paper, we have fabricated a series of Mn-doped BaTiO3 perovskite ceramics (BaTi1–xMnxO3, x = 0.1% and 1%, BTMO) to systematically investigate the ...
Zhen Zhang, Zhaokuan Wen, Ting Li, Zhiguo Wang, Zhiyong Liu, Xiaxia Liao, Shanming Ke, Longlong Shu   +7 more
openaire   +1 more source

Piezoelectric and flexoelectric effects in ferroelectric liquid crystals

Physical Review E, 2012
Flexoelectric and piezoelectric effects in ferroelectric liquid crystals (FLCs) have been studied. It is shown that nonlinear electromechanical coupling is determined by a local flexoelectric effect. Dependence of the parameters of nonlinearity of the flexoelectric effect on the parameter of phase transition from a paraelectric phase to a polar phase ...
E V, Popova, E I, Kopeychenko, A I, Krivoshey, V V, Vashchenko, A P, Fedoryako   +4 more
openaire   +2 more sources