Results 251 to 260 of about 429,377 (286)

Electrowetting hysteresis on a deformable dielectric film

Soft Matter
Electrowetting on dielectric (EWOD) involves actuating surfactant-laden droplets through electrical stimulus while the droplets lie on a deformable dielectric layer that covers the electrode.
Sumit Kumar, Eyal Zussman
openaire   +2 more sources

Dielectric Hysteresis in Thin-Film Ferroelectrics and Relaxors

2006 IEEE International Symposium on the Applications of Ferroelectrics, 2006
Heterostructures of thin-film perovskite ferroelectrics and relaxors were grown by in situ pulsed laser deposition on La 0.5 Sr 0.5 CoO 3 /MgO and Pt/sapphire. The dielectric response of the heterostructures was measured as a function of frequency, temperature, amplitude of ac field, magnitude of dc field, and varying the measurement rate.
M. Tyunina, J. Levoska, I. Jaakola
openaire   +1 more source

Dielectric Hysteresis Loop in Alicyclic and Aromatic Polyamides

Japanese Journal of Applied Physics, 1994
The relationship between electric displacement D and electric field E was studied for alicyclic polyamides of 1,3-bis(aminomethyl)cyclohexane and adipic, pimelic and sebacic acids, an aromatic polyamide prepared from hexamethylenediamine (HMD) and isophthalic acid and a copolyamide of HMD with isophthalic and terephthalic acids.
Yukinobu Murata, Kenji Tsunashima, Naokazu Koizumi   +2 more
openaire   +1 more source

Investigation of Dielectric Hysteresis in Ferroelectric Liquid Crystals

Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics, 1987
Abstract The device for measurement of spontaneous polarization, resistance and capacity of ferroelectric liquid crystals in a wide amplitude and frequency range of applied electric field is described. Data for spontaneous polarization and different type hysteresis loops for smectic C* liquid crystals are presented.
G. S. Chilaya, B. A. Loginov
openaire   +1 more source

Dielectric Hysteresis Loops of Photosensitive Relaxor Ferroelectrics

Ferroelectrics, 2005
We have studied the effects of illumination by a photoactive light on the polarization switching of strontium-barium niobate crystals in quasi-static periodic electric field. The illumination results in an increase of the polarization amplitude and of the most probable coercive field.
V. V. Gladkii, V. A. Kirikov, T. R. Volk, E. S. Ivanova   +3 more
openaire   +1 more source

Characterization and modeling of viscoelastic hysteresis in a dielectric elastomer actuator

Smart Materials and Structures, 2020
Abstract This paper presents characterization and modeling for viscoelastic hysteresis exhibited by dielectric elastomer actuator (DEAs). Firstly, output–input characteristics in terms of hysteresis, asymmetry and output nonlinearity are quantitatively described by proposed indicators.
Yunhua Zhao, Guang Meng, Wenming Zhang
openaire   +1 more source

Hysteresis loss and dielectric constant in barium titanate

British Journal of Applied Physics, 1967
A qualitative description is presented for the behaviour of the hysteresis loss and the dielectric constant in ceramic barium titanate in terms of the properties of single-crystal barium titanate. When the effects of imperfections and interaction between crystallites are introduced, this description explains the similarity between the dielectric ...
openaire   +1 more source

Hysteresis of dielectric properties of Li-Ti-Ferrite ceramics

Russian Physics Journal, 2004
Field dependences of Li-Ti ferrite ceramics polarization are obtained. When related to temperature, these dependences exhibit either non-linear behavior or non-linearity and hysteresis. Electric Barkhausen’s pulses are revealed. Temperature dependences of the electric pulse heights are obtained after re-polarization of the specimens in the electric ...
A. V. Malyshev, V. V. Peshev, A. P. Surzhikov   +2 more
openaire   +1 more source

Hysteresis in Dielectric Properties of Fluid-Saturated Porous Media

Proceedings of SPE Asia Pacific Improved Oil Recovery Conference, 1999
Abstract We present in this paper the results of measurements of the complex dielectric permittivity and electric conductivity in three different porous media, made from unconsolidated acid-purified quartz sand and glass grains. To ensure the generality of the results, we use sand and glass grains of different geometry and particle size ...
Buu-Long Nguyen, Johannes Bruining, Evert C. Slob   +2 more
openaire   +1 more source

Photoinduced hysteresis changes and charge trapping in BaTiO3 dielectrics

Applied Physics Letters, 1994
We have been able to observe intrinsic photoinduced changes in the hysteresis response of BaTiO3 single crystals by the application of ultraviolet (UV) light in combination with an applied bias. The amount of switchable polarization can be suppressed by over 90% by this UV/bias treatment. The photoferroelectric effects are reproducible, reversible, and
W. L. Warren, D. Dimos
openaire   +1 more source