Publication

Dielectric non-linearity and the nature of polarization response of PbMg1/3Nb2/3O3 relaxor ferroelectric

Alexander Tagantsev
1998
Journal Articles

Abstract

We investigate the non-linear dielectric properties of PbMg1/3Nb2/3O3 (PMN) single crystals and present the following experimental evidence: (a) the absence of the anomaly in the temperature dependence of non-linear coefficients in the relationship between the electric field and polarization, E(P); (b) large difference between the "ac" and "dc" non-linear effects; (c) non-analytical behavior of non-linear dielectric response and the crossover in its field exponents. The fact (a) clearly evidences against the glassy behavior of PMN. The results (b) and (c) can be understood using the model of the interphase boundary motion in PMN.

Official source

https://infoscience.epfl.ch/entities/publication/94050554-2253-4769-ac84-82f1c30f21ad

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Alexander Tagantsev
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/94050554-2253-4769-ac84-82f1c30f21ad

About this result

Related concepts (32)

Polarization density

In classical electromagnetism, polarization density (or electric polarization, or simply polarization) is the vector field that expresses the density of permanent or induced electric dipole moments in a dielectric material. When a dielectric is placed in an external electric field, its molecules gain electric dipole moment and the dielectric is said to be polarized. The electric dipole moment induced per unit volume of the dielectric material is called the electric polarization of the dielectric.

Electric susceptibility

In electricity (electromagnetism), the electric susceptibility (; Latin: susceptibilis "receptive") is a dimensionless proportionality constant that indicates the degree of polarization of a dielectric material in response to an applied electric field. The greater the electric susceptibility, the greater the ability of a material to polarize in response to the field, and thereby reduce the total electric field inside the material(and store energy).

Relative permittivity

The relative permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of a vacuum. A dielectric is an insulating material, and the dielectric constant of an insulator measures the ability of the insulator to store electric energy in an electrical field. Permittivity is a material's property that affects the Coulomb force between two point charges in the material. Relative permittivity is the factor by which the electric field between the charges is decreased relative to vacuum.

Related publications (32)

Dielectric non-linearity and the nature of polarization response of PbMg1/3Nb2/3O3 relaxor ferroelectric

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