Вышедшие номера
General Features of the Intrinsic Ferroelectric Coercive Field
Fridkin V.M.1,2, Ducharme Stephen1
1Department of Physics and Astronomy, Center for Material Research and Analysis University of Nebraska, Lincoln, USA
2Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, Russia
Email: sducharme1@unl.edu
Поступила в редакцию: 14 декабря 2000 г.
Выставление онлайн: 19 июня 2001 г.

The value of the intrinsic ferroelectric coercive field is obtained independently from general energy considerations and from the predictions of several models of the ferroelectric state. All predictions yield a value of order of the depolarization field, which is equal to the spontaneous polarization divided by the dielectric permittivity, and are consistent with the recent measurements of the intrinsic ferroelectric coercive field in ultrathin Langmuir-Blodgett films of copolymers of polyvinylidene fluoride with trifluoroethylene. Prior studies had succeeded only in measuring the much smaller extrinsic coercive fields, which are limited by nucleation processes and domain motion. This work was supported by the USA National Science Foundation and the Nebraska Research Initiative.