Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2007

Идентификатор DOI: 10.1007/s10832-007-9015-8

Ключевые слова: Electrostatic problem, Homogenization, Local electric field, Nonlinear composite, Overall properties, Tunability, Composite materials, Computer simulation, Concentration (process), Electric field effects, Permittivity, Electrostatic problems, Local electric fields, Periodic structures

Аннотация: This paper addresses the rigorous treatment of the tunability effect (dc electric field driven variation of the permittivity) in a high-contrast two dimensional periodic composite (a matrix of a large dielectric constant ferroelectric material with linear dielectric inclusions). The theoretical analysis here shows that the trend established for the case of low linear dielectric concentrations (that the dilution with a low permittivity dielectric does not result in decrease of the tunability of the composite material), can hold for appreciable dielectric concentrations. We have even documented a pronounced increase of the tunability. The results of our simulations are in qualitative agreement with the experimental data on the composite effect in ferroelectric/dielectric binary-phase systems. The result of the numerical analysis gives no support to the "decoupled approximation" in the effective medium approach often used for the description of the dielectric non-linearity of composites. © Springer Science+Business Media, LLC 2007.

Журнал: Journal of Electroceramics

Выпуск журнала: Vol. 18, Is. 1-2

Номера страниц: 129-137

• Kolpakov A. (Department of Telecommunication Networks and Computer Systems, Siberian State University of Telecommunications and Informatics, 324, Bld.95, 9th November str., Novosibirsk 630009, Russian Federation)
• Tagantsev A.K. (Ceramics Laboratory, Swiss Federal Institute of Technology, EPFL, Lausanne 1015, Switzerland)
• Berlyand L. (Department of Mathematics, Penn State University, University Park, PA 16802, United States)
• Kanareykin A. (Euclid TechLabs. LLC, Solon, OH 44139, United States)

• Scopus