spontaneous polarization

spontaneous polarization

[spän′tā·nē·əs ‚pō·lə·rə′zā·shən]
(electricity)
Electric polarization that a substance possesses in the absence of an external electric field.
References in periodicals archive ?
Deformation, mainly determined by polarization square, can be used for the assessment of the macroscopic spontaneous polarization of ferroelectrics and the mean square of polarization in relaxor ferroelectrics.
3] and its solid solutions, as in other perovskites, the ordering parameter is presented by spontaneous polarization P = ([P.
Via mimetic theory, Roberto Farneti (Assistant Professor of Politics, School of Economics and Management, Free University of Bozen-Bolzano, Italy) highlights phenomena that political scientists have consistently failed to notice, such as reciprocal imitation as the fundamental cause of human discord, the mechanisms of spontaneous polarization in human conflicts (i.
Urbanc and Zeks [11] suggested that the spontaneous polarization (Ps) induced by a 'Type II' chiral dopant is influenced by steric interactions with the surroundings of host molecules that affects the rotational distribution of the core transverse dipole moment - with respect to the polar axis of the SmC phase [10].
In the cooling cycle phase I does not revert back directly to phase II but passes through phase III (rhombohedral crystal structure) in the temperature range (110-124[degrees]C) with the spontaneous polarization along the c-axis (21) and then to phase II as shown in Fig.
s] is the spontaneous polarization of the ferroelectric material.
In the study, the researchers have demonstrated for the first time a giant intrinsic electroresistance in conventional ferroelectric films, where flipping of the spontaneous polarization increased conductance by up to 50,000 percent.
By applying an electrical poling field, typically 2 V/cm, across the crystal boule at an elevated temperature (1140 [degrees] C), and cooling under its influence, the ions can be made to displace along the direction of the electric field, thus inducing a well-ordered degree of spontaneous polarization (single ferroelectric domains), which is maintained at room temperature.
The FLC's layered, chiral structure and spontaneous polarization capability make device fabrication more complex than in conventional nematic or cholesteric LC materials, says Marshall.
In ferroelectrics the dielectric losses are associated with the hysteresis in the spontaneous polarization switching in alternating electric fields (dielectric hysteresis loop), i.
Observation of the spontaneous polarization reversal can be made by the application of a sinusoidally varying field while continuously monitoring the polarization reversal current and/or charge.

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