Dielectric Polarization

dielectric polarization

[‚dī·ə′lek·trik ‚pō·lə·rə′zā·shən]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Polarization, Dielectric


(1) The displacement of positive and negative charges in opposite directions in a dielectric. Polarization occurs through the action of an electric field or other external factors, such as mechanical stress in the case of piezoelectric crystals. Dielectric polarization can also arise spontaneously in pyroelectric crystals, particularly in ferroelectrics.

(2) The dipole moment per unit volume of a dielectric.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Here, the [[epsilon].sub.1] and [[epsilon].sub.2] are attributed to dielectric polarization and optical absorption of the system, respectively.
Undoped ZrHf[O.sub.2] film exhibits ferroelectricity behavior on polarization-electric curve test while hysteresis characteristic disappears on the Al-doped ZrHf[O.sub.2] film, indicating typical dielectric polarization behavior.
According to the Debye equation, relaxation of dielectric polarization occurs at a natural resonant frequency and when internal frequency has collapsed.
When a dielectric is placed in an electric field, electric charges do not flow through the material but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction [16].
The measurement beam focused onto the sample induces a nonlinear dielectric polarization ([P.sup.(3)]), which provides backscattering from it.
The electric charges in dielectrics will respond to an applied electric field through the change of dielectric polarization. Dielectric materials are nearly insulators in which the electrical conductivity is very low and the energy band gap is large.
Kirkwood, "The dielectric polarization of polar liquids," The Journal of Chemical Physics, vol.
The dependence of contributions of different components of dielectric polarization, such as electric, ionic, and orientational polarization on the frequency of the applied electric field, is responsible for the change in the value of the dielectric constant.
For example, the dielectric polarization and electric fields are odd under parity transformations and even under time-reversal transformations.
The MCPs use electrode strips to create dielectric polarization, allowing for the movement of ions toward or away from a positive or negative charge.
They then switch focus to nonequilibrium electrokinetic phenomena in chapters discussing field-induced dielectric polarization, field-induced double layer polarization, dielectrophoresis, and electrorotation.