Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26335
Title: Leakage current and relaxation characteristics of electron-irradiated poly(vinylidene fluoride-trifluoroethylene) copolymers
Authors: Guo, SS
Li, WP
Sun, CL
Wang, DH
Zhao, XZ
Wang, J
Chan, HLW 
Choy, CL 
Keywords: Electron-irradiation
Leakage current
Poly(vinylidene fluoride-trifluoroethylene)
Relaxor ferroelectrics
Issue Date: 2004
Publisher: North-Holland
Source: Materials letters, 2004, v. 58, no. 6, p. 1064-1070 How to cite?
Journal: Materials letters 
Abstract: Leakage current of direct current (DC) conduction for high-energy electron-irradiated poly(vinylidene fluoride-trifluoroethylene) 56/44 and 80/20 mol% copolymers have been studied at room temperature under various electric fields. It is found that the leakage current is strongly dependent of time and that the trapping limit of space-charge changes with the transition from a normal ferroelectric to a relaxor ferroelectric. It is suggested that the leakage current at low electric field is mainly due to the effect of space-charge trapping during the poling process in addition to contribution from dipoles. The copolymers become typical relaxor ferroelectrics after irradiation, which obeys the Vogel-Fulcher (V-F) law, indicating that the ferroelectric relaxation is also responsible for the limit of space-charge trapping in the electron-irradiated copolymer electrets.
URI: http://hdl.handle.net/10397/26335
ISSN: 0167-577X
EISSN: 1873-4979
DOI: 10.1016/j.matlet.2003.08.018
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