Dielectric enhancement and Maxwell-Wagner effects in polycrystalline ferroelectric multilayered thin films

Dielectric enhancement and Maxwell-Wagner effects in polycrystalline ferroelectric multilayered thin films

Dielectric enhancement was observed in polycrystalline BaTiO3 /Ba0.6Sr0.4TiO3 multilayered thin films deposited layer-by-layer on Pt/Ti/SiO2/Si substrates via pulsed laser deposition. The dielectric constant of the films was enhanced more than four times with the decrease of the individual layer thi...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 2001-10, Vol.34 (19), p.2935-2938
Hauptverfasser: Shen, Mingrong, Ge, Shuibing, Cao, Wenwu
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric properties of solids and liquids
Dielectric thin films
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Niobates, titanates, tantalates, pzt ceramics, etc
Permittivity (dielectric function)
Physics
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container_end_page 2938
container_issue 19
container_start_page 2935
container_title Journal of physics. D, Applied physics
container_volume 34
creator Shen, Mingrong
Ge, Shuibing
Cao, Wenwu
description Dielectric enhancement was observed in polycrystalline BaTiO3 /Ba0.6Sr0.4TiO3 multilayered thin films deposited layer-by-layer on Pt/Ti/SiO2/Si substrates via pulsed laser deposition. The dielectric constant of the films was enhanced more than four times with the decrease of the individual layer thickness down to 30 nm, while the dielectric loss was kept at a low level comparable to that of the solid solution Ba0.8Sr0.2TiO3 thin films. The Maxwell-Wagner model is proposed to explain the experimental data, which can predict both the dielectric enhancement and frequency dependence when the individual layer thickness is more than 40 nm. (Author)
doi_str_mv 10.1088/0022-3727/34/19/301
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric properties of solids and liquids
Dielectric thin films
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Niobates, titanates, tantalates, pzt ceramics, etc
Permittivity (dielectric function)
Physics
title Dielectric enhancement and Maxwell-Wagner effects in polycrystalline ferroelectric multilayered thin films
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