Coexisting ferroelectric and paraelectric phases in electron beam irradiated P(VDF-TrFE) films

被引：4

作者：

Kim, Jae Woong ^{[1
]}

Lee, Tae Kwon ^{[1
]}

Jung, Jong Hoon ^{[1
]}

Shin, Sunhyeop ^{[2
]}

Lee, Byoung Wan ^{[2
]}

Ko, Jae-Hyeon ^{[2
]}

机构：

[1] Inha Univ, Dept Phys, Inchon 22212, South Korea

[2] Hallym Univ, Dept Phys, Chunchon 24252, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2016年 / 69卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Electron beam irradiation; P(VDF-TrFE); Relaxor behavior; Coexisting phases; FLUORIDE-TRIFLUOROETHYLENE COPOLYMERS; POLY(VINYLIDENE FLUORIDE-TRIFLUOROETHYLENE) COPOLYMER; TRANSITION; BEHAVIOR;

D O I：

10.3938/jkps.69.1724

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on structural, electrical, and Raman investigations of phase changes induced in P(VDF-TrFE) films by electron beam irradiation. With increasing electron beam dose, the ferroelectric beta-phase is weakened because of reductions in the coercive field, remnant polarization, and Curie temperature. Finally, highly dosed (9.38 x 10(16) cm(-2)) P(VDF-TrFE) shows a paraelectric alpha-phase. A Vogel-Folcher type relaxor behavior becomes strong with the decreasing freezing temperature and the increasing activation energy. From the Raman scattering measurement, we observed that both the alpha- and the beta-phases coexist irrespective of the electron beam irradiation and that the temperature dependences of the alpha- and beta-phases are quite different. The ratio of the intensity of the alpha-phase to that of the beta-phase sharply increases at a certain temperature, at which polar nanoregions may disappear.

引用

页码：1724 / 1728

页数：5

共 20 条

[1] Phase transitions and ferroelectric relaxor behavior in P(VDF-TrFE-CFE) terpolymers [J].