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2007-09-20
Tunability of Granular Ferroelectric Dielectric Composites
By
, Vol. 78, 189-207, 2008
Abstract
Electrical tunability of a composite consisting of small ferroelectric spheres randomly dispersed into a dielectric background is studied. A new method to calculate the effective permittivity of such a nonlinear composite is introduced. The method is based on the Bruggeman effective medium theory and a specific model for the nonlinear permittivity of the ferrite. The resulting tunability (defined as a measure of the change in the permittivity due to the bias field) is a continuous function of the volume fraction of the ferroelectric material phase in the composite. As an example,SrTiO3 is studied with two different nontunable background materials.
Citation
Liisi Jylha Ari Sihvola , "Tunability of Granular Ferroelectric Dielectric Composites," , Vol. 78, 189-207, 2008.
doi:10.2528/PIER07081502
http://www.jpier.org/PIER/pier.php?paper=07081502
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