Ferroelectricity

Ferroelectricity is a property of certain materials which has a spontaneous electric polarization that can be reversed by the application of an external electric field. 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 Valasek. Thus, the prefix ferro, meaning iron, was used to describe the property despite the fact that most ferroelectric materials do not contain iron.

Read more about FerroelectricityPolarization, Applications, Materials, Theory

Other articles related to "ferroelectricity":

Mechanisms For Ferroelectricity in Multiferroics - Lone Pair Multiferroics
... A possible mechanism for the coexistence of magnetism and ferroelectricity (multiferroic), is lone-pair driven, where the A-site drives the displacement and partially filled “d ... of the cation towards the neighboring anion resulting in ferroelectricity In usual perovskite-based ferroelectrics like BaTiO3, the ferroelectric distortion occurs due to the ... filled "d" shell on the B-site reduces the tendency of perovskites to display ferroelectricity ...
Mechanisms For Ferroelectricity in Multiferroics - Charge Ordering
... These ions form a polar arrangement, causing improper ferroelectricity (i.e ... If magnetic ions are present, a coexisting magnetic order can be established and may be coupled to ferroelectricity One prominent example for a charge ordered multiferroic is LuFe2O4, which shows improper ... In addition, charge ordered ferroelectricity is suggested in Fe3O4 and (Pr,Ca)MnO3 ...
Ferroelectricity - Theory
... In all known ferroelectrics, and ... These coefficients may be obtained experimentally or from ab-initio simulations ...
Mechanisms For Ferroelectricity in Multiferroics - Magnetically Driven Ferroelectricity
... The difference lie in the driving force (the primary order parameter) that lead to ferroelectricity In the case of proper FE, the primary order parameter is the ... ME coupling is very strong because ferroelectricity is driven by magnetic order and do not exist without the latter ... that any change in the magnetic order will have an impact on the ferroelectricity ...