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Measuring inverse flexoelectric effect at the macro scale and flexoelectric actuator
Journal of Physics D: Applied PhysicsAbstract The flexoelectric effect is a two-way mechanical-electrical coupling. The dielectric is polarized when subjected to bending moments, and inversely, the electric field can also induce strain gradients within the dielectric. Although equally important, research on the inverse flexoelectric effect has lagged far behind that on the ...
Sihao Lv, Zhaoqi Li, Shengping Shen
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The flexoelectric effect in Al-doped hafnium oxide
Nanoscale, 2018After the observation of ferroelectric HfO 2 , interest in ferroelectric-based nanoelectronics has been renewed. However, ferroelectrics also show coupling between the electrical polarization and the deformation gradient, defined as flexoelectricity.
Umberto Celano +9 more
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The theory of flexoelectric effect of polymer glasses
Colloid & Polymer Science, 1991Electric polarization induced by a nonhomogenous deformation flied — flexo-electricity — has has been studied on a model of polymer in the glassy state. The results are expressed in terms of phenomenological coefficients, which are analogical to the electric polarizability.
M. Schulz, M. Marvan
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Flexoelectric Effect for Cracks in Piezoelectric Solids
Key Engineering Materials, 2018The finite element method (FEM) is developed to analyse 2-D crack problems where the electric field and displacement gradients exhibit a size effect penomenon. This phenomenon in micro/nanoelectronic structures is described by the strain-and electric field-gradients in constitutive equations.
Jan Sladek +3 more
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Spontaneous flexoelectric/flexomagnetic effect in nanoferroics
Physical Review B, 2009Within the Landau-Ginsburg-Devonshire phenomenological approach we study the ferroic nanosystem properties changes caused by the flexoeffect (flexoelectric and flexomagnetic) existing spontaneously due to the inhomogeneity of order parameters. An exact solution for the spatially inhomogeneous mechanical displacement vector allowing for flexocoupling ...
Eugene A. Eliseev +3 more
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Effect of flexoelectricity on the curvature elasticity of the membrane
Liquid Crystals, 1990Abstract The contribution of flexoelectricity to the curvature elastic modulus for a symmetric lipid bilayer is calculated. The cases of permitted and forbidden charge exchange between the electrolyte on both sides of the membrane are discussed. On the basis of a simplified model of the lipid bilayer, an estimate of the difference of the moduli ...
I. Bivas, M. M. Kozlov
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Decoupled shear flexoelectric effects in polymers
Journal of Applied Physics, 2019The coupling between dielectric polarization and strain gradient, known as flexoelectricity, is a property of all dielectric materials. Flexoelectric coefficients are essential during applications. In order to increase the number of measurable flexoelectric coefficients, more experimental approaches are needed. In this work, circular terrace and column
Kaiyuan Liu +5 more
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Shape model for the molecular interpretation of the flexoelectric effect
Physical Review E, 2001A mean-field model for the flexoelectric polarization in nematics is presented, based on a continuous description of director deformations coupled to the molecular degrees of freedom via surface interactions. In such a framework, a consistent picture of the flexoelectric effect is obtained, including both dipolar and quadrupolar contributions, with a ...
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Manipulation of field-effect transistors by flexoelectric effect
Applied Physics LettersFlexoelectric field-effect transistors (FE-FETs) hold significant potential for applications in biomedical and healthcare sensing fields. While existing piezoelectric FETs sense physiological signals based on pressure or compressive strain, movements such as bending of the elbow or knee joints are more common in physiological activities than external ...
Yuxin Zuo +7 more
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Flexoelectric Effect in a HAN-IPS Cell
Molecular Crystals and Liquid Crystals, 2010Flexoelectric properties are evident in experiments preformed with hybrid aligned nematic. In this article, the flexoelectric effect in a hybrid aligned nematic in-plane switching liquid-crystal cell is investigated. The equations for the distribution of the liquid-crystal director and the expression of critical voltage in the one-constant ...
Guili Zheng, Zhidong Zhang
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