Giant permittivity effects from the core-shell structure modeling of the dielectric spectra

0537526 - FZÚ 2021 RIV GB eng J - Journal Article
Rychetský, Ivan - Nuzhnyy, Dmitry - Petzelt, Jan
Giant permittivity effects from the core-shell structure modeling of the dielectric spectra.
Ferroelectrics. Roč. 569, č. 1 (2020), s. 9-20. ISSN 0015-0193. E-ISSN 1563-5112
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : Giant permittivity * effective medium approximation * Bergman spectral representation * core–shell structure * effective permittivity modeling * generalized brick model
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.620, year: 2020
Method of publishing: Limited access
https://doi.org/10.1080/00150193.2020.1791659

Giant permittivity (GP) materials are of interest as possible capacitors for energy storage. Ferroelectric and related homogeneous materials suffer from strongly temperature dependent dielectric properties. Therefore, within the last two decades, the interest has been focused to dielectric studies of various inhomogeneous GP materials, where the essential role was shown to be due to weak but inhomogeneous conductivity. Here we study, within the known models based on effective medium approximation, the broadband dielectric spectra of conducting core – less conducting shell structures, which are expected to be the most advantageous for revealing the GP effects.
Permanent Link: http://hdl.handle.net/11104/0315332