Energiespeicherdichte ferroelektrisch

Typische Begleiterscheinungen der Ferroelektrizität sind: Paraelektrizität oberhalb der Curie-Temperatur;Übergang zu mehreren Kristallstrukturen niedrigerer Symmetrie bei Temperaturerniedrigung auch unterhalb des Curie-Punkts; Gültigkeit des Curie-Weiss-Gesetzes in der Nähe des Curie-Punkts; optische Doppelbrechung des Kristallgitters aufgrund der aus

When was ferroelectricity invented?

The modern concept of ferroelectricity was defined later, although at one point in his habilitation of 1912 Erwin Schrödinger used the phrase ‘ferroelektrisch’ in analogy to ferromagnetism for materials with permanent electric polarization.

Which materials show ferroelectricity?

Perovskites having the general formula ABO 3, where A and B are metal cations , are the most important materials that can show ferroelectricity. A very popular model system is BaTiO3 (BTO).

What is a ferroelectric material?

A ferroelectric is formally defined as a pyroelectric material that has a reversible, or ‘switchable,’ polarization. Ferroelectricity was discovered in ca. 1920 by Valasek219,220 in Rochelle salt (NaKC4 H 4 O 6 ⋅4H 2O) – a material that was known at the time for its piezoelectric and pyroelectric properties.

Why is ferroelectricity called ferromagnetism?

The term “ferroelectricity” is analogous to ferromagnetism (whereby a material possesses a permanent magnetic moment) despite the fact that most ferroelectric materials do not contain iron (ferum, from which the word ferro is derived).

What is a ferroelectric chapter?

This chapter provides a view of the physical origins of ferroelectricity, classifications of ferroelectrics, crystal point groups, synthesis and fabrication of ferroelectric materials, and the day-today applications. Georg Schönweger, Simon Fichtner, in Semiconductors and Semimetals, 2023

Why is ferroelectricity important?

Ferroelectricity refers to many related phenomena specific to ferroelectrics. Properties of these materials have made them important for various applications, some of which are mentioned in this article. Most ferroelectrics have small conductivity and are considered to be a special class of insulators (dielectrics).