Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/398
Title: Hydrogen-related dynamic dielectric behavior of barium titanate single crystals
Authors: Chen, WP
Wang, Y 
Chan, HLW 
Luo, H
Issue Date: 18-May-2006
Source: Applied physics letters, 18 May 2006, v. 88, 202906, p. 1-3
Abstract: Barium titanate single crystals had been placed in 0.01M NaOH solution to deposit hydrogen on their electrodes through the electrolysis of water. Two kinds of time-dependent changes in dielectric properties of the single crystals were observed: One occurred in the course of hydrogen deposition and the other lasted for a long period of time after the deposition. The diffusion of hydrogen and in and out of the single crystals may be the cause for the changes. This hydrogen-related dynamic dielectric behavior clearly shows that hydrogen is an important mobile ion other than oxygen vacancy in perovskite-type lattice. Extra attention should be paid to the role of hydrogen in time-dependent property changes, including resistance degradation and ferroelectric aging, of perovskite-type ferroelectric titanates.
Keywords: Barium compounds
Hydrogen
Ferroelectric materials
Electrolysis
Diffusion
Ion mobility
Vacancies (crystal)
Ageing
Publisher: American Institute of Physics
Journal: Applied physics letters 
ISSN: 0003-6951
EISSN: 1077-3118
Rights: © 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in W.P. Chen et al. Appl. Phys. Lett. 88, 202906 (2006) and may be found at http://link.aip.org/link/?apl/88/202906
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