Intrinsic and extrinsic effects on the ferroelectric switching of thin poly(vinylidene fluoride/trifluoroethylene) copolymer films
Author(s) -
Manfang Mai,
Shanming Ke,
Peng Lin,
Xierong Zeng
Publication year - 2016
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.4947142
Subject(s) - materials science , ferroelectricity , polarization (electrochemistry) , switching time , thin film , oxide , fluoride , depolarization , electrode , copolymer , condensed matter physics , composite material , optoelectronics , dielectric , nanotechnology , polymer , inorganic chemistry , medicine , chemistry , endocrinology , metallurgy , physics
In this paper, intrinsic and extrinsic factors dependent switching process in P(VDF-TrFE) thin films is investigated through time domain polarization measurements. The thinning-induced increase of switching time is observed for samples below 80 nm due to the surface oxide layer. For thinner samples the switchable polarization decreases with decreasing temperature since domain pinning prevails. Switching is faster using metal electrode with higher work function, which can be attributed to the lower depolarization field. Furthermore, the switching time increases with increasing the waiting time and increasing the pulse width of the prepolarization pulse caused by imprint effect
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