文献类型：期刊文献

英文题名：Domain stabilization effect of interlayer on ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin film

作者：Xu, Haisheng[1,2];Liu, Xiaobing[1];Fang, Xuerang[1];Xie, Haifen[1];Li, Guobing[1];Meng, Xiangjian[2];Sun, Jinglan[2];Chu, Junhao[2]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

年份：2009

卷号：105

期号：3

外文期刊名：JOURNAL OF APPLIED PHYSICS

收录：;EI(收录号：20090911925669);WOS:【SCI-EXPANDED(收录号:WOS:000263409700081)】；

基金：This work was supported by Science and Technology Commission of Shanghai Municipality under Grant No. 07pj14029.

语种：英文

外文关键词：buffer layers; charge injection; dielectric hysteresis; dielectric polarisation; electric domains; electrodes; ferroelectric coercive field; ferroelectric switching; ferroelectric thin films; metallisation; polymer blends; polymer films; random-access storage

摘要：A charge injection material, poly(3,4-ethylene dioxythioohene)-poly(styrene sulfonic) acid, is introduced as a buffer layer between metal electrodes and a ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer ultrathin film. The buffer layer not only prevents the reactions between P(VDF-TrFE) layer and the top electrode during metallization process, which leads to the loss of polarization, but also supplies the amount of charges needed for compensation of the ferroelectric dipoles to stabilize the domain during switching process so that the fatigue property was improved tremendously. The sandwiched structure shows prominent ferroelectric properties in a 50 nm P(VDF/TrFE) film. A coercive electric field of 52 MV/m and a remnant polarization of 88 mC/m(2) are recorded. With two additional organic interlayers, 33 nm thick in total, the coercive field decreases. After more than 1x10(7) cycles of switching, the polarization remains as high as 68 mC/m(2). Moreover, the cell still has good ferroelectric properties at 60 degrees C. Even as the thickness of P(VDF/TrFE) film is down to 25 nm, a remnant polarization of 54 mC/m(2) is obtained.