By Topic

Effect of space charge on polarization reversal in a copolymer of vinylidene fluoride and trifluoroethylene

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Ikeda, Susumu ; Department of Polymer Materials Engineering, Faculty of Engineering, Yamagata University, Jonan 4‐3‐16, Yonezawa 992, Japan ; Fukada, Tomohiro ; Wada, Yasaku

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.341733 

Polarization‐reversal phenomena in ferroelectric copolymers of vinylidene fluoride and trifluoroethylene are affected by the time interval elapsed after poling of samples. Measurements of switching current demonstrated that this waiting effect is enhanced with the increase of space charges and switching curves with different waiting intervals satisfy the scaling rule when each switching curve is scaled by the switching time. These facts suggest that the electric field that reverses the spontaneous polarization decreases due to the electric field coming from space charges in the amorphous phase. A model with a prolate ellipsoid crystal and space charges in the amorphous phase explains such experimental facts. The difference of the waiting effect among samples crystallized under different conditions is also explained through the difference in the depolarization field coefficient of crystals.

Published in:

Journal of Applied Physics  (Volume:64 ,  Issue: 4 )