scholarly journals Deformation anisotropy of Y + 128° –cut single crystalline bidomain wafers of lithium niobate

2016 ◽  
Vol 19 (2) ◽  
pp. 95-102
Author(s):  
I. V. Kubasov ◽  
A. V. Popov ◽  
A. S. Bykov ◽  
A. A. Temirov ◽  
A. M. Kislyuk ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
External Electric Field ◽  
Rotation Angle ◽  
Radial Distance ◽  
Lithium Tantalate ◽  
Field Application ◽  
Diffusion Method ◽  
Long Time ◽  
Dc Electric Field

Bidomain single crystals of lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) are promising material for usage as actuators, mechanoelectrical transducers and sensors working in a wide temperature range. It is necessary to take into account anisotropy of properties of crystalline material when such devices are designed. Inthis study we investigated deformations of bidomain round shapedY+ 128°-cut wafers of lithium niobate in an external electric field. Dependencies of piezoelectric coefficients on rotation angles were calculated for lithium niobate and lithium tantalate and plotted for the crystal cuts which are used for bidomain ferroelectric structure formation. In experiment, we utilized external heating method and long-time annealing with lithium out-diffusion method in order to create round bidomain lithium niobate wafers. In order to obtain dependencies of the bidomain crystals’ movements on the rotation angle with central fastening and external electric field application optical microscopy was used. We also modeled a shape of the deformed bidomain wafer with a suggestion that the edge movement depends on the radial distance to the fastening point quadratically. In conclusion, bidomainY+ 128°-cut lithium niobate wafer exhibits saddle-like deformation when DC electric field is applied.

Modeling and simulation of external electric field application for diisopropyl methylphosphonate sensing through B12N12 fullerene

2021 ◽  
pp. 116845
Author(s):  
Yan Cao ◽  
Afrasyab Khan ◽  
Elham Tazikeh-Lemeski ◽  
Masoud Javan ◽  
Mohammad T. Baei ◽  
...  
Keyword(s):  
Electric Field ◽  
Modeling And Simulation ◽  
External Electric Field ◽  
Field Application

scholarly journals Передача крутящего момента проводящей частице с использованием силы Лоренца

2022 ◽  
Vol 56 (1) ◽  
pp. 76
Author(s):  
А.И. Грачев
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Field Application ◽  
Conductive Particle ◽  
Particle Rotation ◽  
Dc Electric Field ◽  
First Time ◽  
Cylindrical Particles

In the paper the concept of conductive particle rotation in DC electric field with including the Lorentz force providing generation of electric dipole moment of the particle is for the first time discussed. Some models of the torque transfer to spherical and cylindrical particles based on of the Hall effect at usual geometry and with additional electric field application and also in the case of implementation of the photoelectromagnetic effect are presented.

scholarly journals LONG TIME SIMULATION OF A BEAM IN A PERIODIC FOCUSING CHANNEL VIA A TWO-SCALE PIC-METHOD

2009 ◽  
Vol 19 (02) ◽  
pp. 175-197 ◽  
Author(s):  
EMMANUEL FRÉNOD ◽  
FRANCESCO SALVARANI ◽  
ERIC SONNENDRÜCKER
Keyword(s):  
Electric Field ◽  
Numerical Method ◽  
External Electric Field ◽  
Time Scales ◽  
Asymptotic State ◽  
Limit Model ◽  
Time Simulation ◽  
Charged Beam ◽  
Long Time ◽  
Pic Method

We study the two-scale asymptotics for a charged beam under the action of a rapidly oscillating external electric field. After proving the convergence to the correct asymptotic state, we develop a numerical method for solving the limit model involving two time scales and validate its efficiency for the simulation of long time beam evolution.

In-situ application of dc electric field on ferroelectric substances in an electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 472-473
Author(s):  
N. Yamamoto ◽  
K. Yagi ◽  
G. Honjo
Keyword(s):  
Electron Microscope ◽  
Electric Field ◽  
Field Application ◽  
Cooling Stage ◽  
Specimen Holder ◽  
Present Technique ◽  
Dc Electric Field ◽  
Very High ◽  
Dynamic Phenomena

A technique of in-situ application of a dc electric field on a specimen in an electron microscope has been developed to directly observe dynamic phenomena due to the electric field. In the present technique a thickness of a specimen is so thin that a very high electric field can be applied; a few volt of the potential difference across the specimen of the order of 1000 Å thick gives a field as high as 105 V/cm. An additional field application electrode was incorporated not only in a specimen heating holder but also in a liquid helium cooling stage which had been constructed in our 1aboratory. Thus, the experiments could be performed in a wide temperature range of 13-1000K. Fig.la schematically depicts a specimen holder installed in the cooling stage. The detailed arrangement around a specimen is shown in Fig.1b. An electric potential is applied between electrodes of thin A1 films vacuum deposited on the both faces of the specimen.

Effects of Electric Field on the Fracture Toughness (KIC) of PZT Ceramics

2011 ◽  
Author(s):  
Sam Goljahi ◽  
David Pisani ◽  
John Gallagher ◽  
Christopher S. Lynch
Keyword(s):  
Fracture Toughness ◽  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Electric Field ◽  
Critical Stress ◽  
Critical Stress Intensity Factor ◽  
Field Application ◽  
Four Point Bending ◽  
Dc Electric Field

Ceramic PZT with a controlled crack was subjected to combined four point bending and longitudinal electric field loading to determine the fracture toughness (KIC) as a function of electric field. Application of a positive DC electric field (in the polarization direction) during mechanical loading was observed to reduce the critical stress intensity factor and application of a negative electric field increased the critical stress intensity factor.

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