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Journal of Sol-Gel Science and Technology

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01-09-2010 | Original Paper

Dielectric, ferroelectric and optical properties of BaZr_0.2Ti_0.8O₃ thin films prepared by sol–gel-hydrothermal process

Authors: J. B. Xu, B. Shen, J. W. Zhai

Published in: Journal of Sol-Gel Science and Technology | Issue 3/2010

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Abstract

BaZr_0.2Ti_0.8O₃ thin films on Pt/Ti/SiO₂/Si substrates have been fabricated under low temperature conditions by a sol–gel-hydrothermal technique. The dielectric constant is 247–83 in the frequency range of 1 kHz–1 MHz. The corresponding dielectric loss is ~10⁻². The capacitance–voltage curve shows strong non-linear dielectric behavior leading to a high tunability, up to ~30% at 1 kHz. The remanent polarization and coercive field at room temperature are measured to be ~1.5 μC/cm² and ~90 kV/cm. The infrared optical properties of the thin films are investigated using an infrared spectroscopic ellipsometry in the wave number range of 800–4,000 cm⁻¹. Optical constants of the thin films are simultaneously obtained.

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Title: Dielectric, ferroelectric and optical properties of BaZr0.2Ti0.8O3 thin films prepared by sol–gel-hydrothermal process
Authors: J. B. Xu
B. Shen
J. W. Zhai
Publication date: 01-09-2010
Publisher: Springer US
Published in: Journal of Sol-Gel Science and Technology / Issue 3/2010
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-010-2259-9

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