Publication

Injection-controlled size effect on switching of ferroelectric thin films

Alexander Tagantsev
1999
Journal Articles

Abstract

The effect of near-by-electrode charge injection on switching of a thin film ferroelectric capacitor is theoretically analyzed. We develop a model of switching affected by charge injection through a surface dielectric layer to calculate the coercive field of the capacitor as a function of both film thickness and maximal polarization of the switching cycle. The predictions of the model are verified by electrical measurements on sol-gel derived Pb(Zr, Ti)O-3 thin films of thickness ranging from 100 to 1000 nm with Pt electrodes. The model gives a good description of the size effect on switching in the Pt/Pb(Zr, Ti)O-3/Pt system and enables an explanation for a much smaller magnitude of this effect in Bi-containing and oxide-electrode thin films. (C) 1999 American Institute of Physics. [S0003-6951(99)00409-X].

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https://infoscience.epfl.ch/entities/publication/f4ed67c5-eea6-44b3-a142-e0a660254dac

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Alexander Tagantsev
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f4ed67c5-eea6-44b3-a142-e0a660254dac

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.

Capacitor types

Capacitors are manufactured in many styles, forms, dimensions, and from a large variety of materials. They all contain at least two electrical conductors, called plates, separated by an insulating layer (dielectric). Capacitors are widely used as parts of electrical circuits in many common electrical devices. Capacitors, together with resistors and inductors, belong to the group of passive components in electronic equipment.

Ferroelectricity

Ferroelectricity is a characteristic of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. All ferroelectrics are also piezoelectric and pyroelectric, with the additional property that their natural electrical polarization is reversible. The term is used in analogy to ferromagnetism, in which a material exhibits a permanent magnetic moment. Ferromagnetism was already known when ferroelectricity was discovered in 1920 in Rochelle salt by Joseph Valasek.

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Injection-controlled size effect on switching of ferroelectric thin films

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