Relaxor and nonlinear behaviors of SrTiO3∕BaTiO3 multilayers derived by a sol–gel process

Multilayered SrTiO3∕BaTiO3 thin films were fabricated on LaNiO3-buffered Pt∕Ti∕SiO2∕Si substrates by a sol–gel deposition method. X-ray diffraction, transmission electron microscopy, and x-ray photoelectron spectroscopy were employed to examine the microstructure and crystalline phase of grown films...

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Bibliographic Details
Published in:Applied physics letters 2004-09, Vol.85 (11), p.2026-2028
Main Authors: Zhai, Jiwei, Hung, T. F., Chen, Haydn
Format: Article
Language:English
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Summary:Multilayered SrTiO3∕BaTiO3 thin films were fabricated on LaNiO3-buffered Pt∕Ti∕SiO2∕Si substrates by a sol–gel deposition method. X-ray diffraction, transmission electron microscopy, and x-ray photoelectron spectroscopy were employed to examine the microstructure and crystalline phase of grown films. The dielectric properties were investigated as a function of multiplayer periodicity. Results showed that dielectric responses of these films were extremely similar to those of relaxor ferroelectric ceramics. The hysteresis loop decreased as the individual layer thickness decreased for a fixed total thickness of about 360nm. The dielectric constants, however, increased first then decreased as the individual layer thickness increased.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1785857