Publication

Far-infrared dielectric response of PbTiO3 and PbZr1-xTixO3 thin ferroelectric films

Nava Setter
1995
Journal Articles

Abstract

Far-infrared transmittance and reflectance of PbTiO3, PbZr0.53Ti0.47O3 and PbZr0.75Ti0.25O3 thin films deposited by a sol-gel technique on sapphire substrates were measured between room temperature and 650 degrees C. The spectra were fitted with a classical oscillator model to calculate the dielectric response. Polar-mode parameters are more accurate than data on bulk ceramic materials and are in good agreement with them. An analysis of the soft-made behaviour and comparison with the low-frequency permittivity data clearly indicate the existence of additional relaxation that is always present in the several cm(-1) range, even at room temperature.

Official source

https://infoscience.epfl.ch/entities/publication/945c10f5-c016-4fd9-97e0-5ea76dc1710e

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Nava Setter
1995
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/945c10f5-c016-4fd9-97e0-5ea76dc1710e

About this result

Related concepts (32)

Dielectric

In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field. When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, or free, electrons that may drift through the material, but instead they shift, only slightly, from their average equilibrium positions, causing dielectric polarisation.

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.

Permittivity

In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε (epsilon), is a measure of the electric polarizability of a dielectric. A material with high permittivity polarizes more in response to an applied electric field than a material with low permittivity, thereby storing more energy in the material. In electrostatics, the permittivity plays an important role in determining the capacitance of a capacitor.

Related publications (32)

Far-infrared dielectric response of PbTiO3 and PbZr1-xTixO3 thin ferroelectric films

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