Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4184
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Title: Modeling of anomalous hysteresis behavior of compositionally graded ferroelectric films at low fields
Authors: Wong, CK
Shin, FG
Issue Date: 15-Jul-2005
Source: Journal of applied physics, 15 July 2005, v. 98, no. 2, 024104, p. 1-6
Abstract: We study the hysteresis behavior of compositionally graded ferroelectric films by theoretical simulations. Anomalous vertical (polarization) shift behavior of hysteresis loops measured by a Sawyer-Tower circuit at low/medium applied fields is investigated. The anomalous ferroelectric response is discussed by the use of a multilayer model to account for the variation of properties across the film thickness. Electrical conductivities of the ferroelectric layers have been taken into account and time-dependent space-charge-limited conduction has been adopted. The effects of charge mobility and the amplitude of applied field on the D-E loop shift were examined. Theoretical calculations are discussed in relation to the experimental data from previous works.
Keywords: Ferroelectric thin films
Multilayers
Dielectric hysteresis
Dielectric polarisation
Electrical conductivity
Space charge
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.1985970
Rights: © 2005 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 C. K. Wong & F. G. Shin, J. Appl. Phys. 98, 024104 (2005) and may be found at http://link.aip.org/link/?jap/98/024104.
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