Publication

Size effect on permittivity in ferroelectric polydomain thin films

Nava Setter, Alexander Tagantsev
2004
Journal Articles

Abstract

The impact of electrode-adjacent passive layers on the small signal dielectric response of a ferroelectric film containing a 180degrees-domain pattern has been analyzed. It is shown that, for a realistic physical situation, the so-called "in-series capacitors formula" is still applicable for the description of the dielectric response of this system, however, with some apparent values of the passive-layer permittivity epsilon(mod), which is a function of parameters of the ferroelectric and the layers. It is also shown that the suppressive effect of the passive layer on the permittivity of the ferroelectric film can be significantly reduced when the permittivity of the ferroelectric is mainly controlled by the extrinsic (domain) contribution.

Official source

https://infoscience.epfl.ch/entities/publication/2091c344-ad07-4fd3-aebb-2e61b4e6bacf

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Nava Setter, Alexander Tagantsev
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2091c344-ad07-4fd3-aebb-2e61b4e6bacf

About this result

Related concepts (32)

Capacitor

A capacitor is a device that stores electrical energy in an electric field by accumulating electric charges on two closely spaced surfaces that are insulated from each other. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance. While some capacitance exists between any two electrical conductors in proximity in a circuit, a capacitor is a component designed to add capacitance to a circuit.

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.

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.

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Size effect on permittivity in ferroelectric polydomain thin films

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