High-Symmetry Polarization Domains in Low-Symmetry Ferroelectrics
High-Symmetry Polarization Domains in Low-Symmetry Ferroelectrics
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DOI：
10.1021/nl503070f
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发表时间：
2014-12-01
期刊：
影响因子：
10.8
通讯作者：
Gruverman, A.
中科院分区：
文献类型：
--
作者：
Lukyanchuk, I.;Sharma, P.;Gruverman, A.
我们提出了实验证据的多边形畴小面的铁电聚合物聚（偏氟乙烯-三氟乙烯）（PVDF-TrFE）薄膜具有较低的正交晶体对称性。有人提出，这种效果可能会产生纯粹的静电去极化力。我们发现，在对比磁泡形状的域，这种类型的变形不稳定性具有主要的椭圆形字符，更对称的圆谐波的出现是有利的铁电体与高介电常数。
We present experimental evidence for polygonal domain faceting in the ferroelectric polymer poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) films with the lower orthorhombic crystallographic symmetry. It is proposed that this effect can arise from purely electrostatic depolarizing forces. We show that, in contrast to magnetic bubble shape domains, where such type of deformation instability has a predominantly elliptical character, the emergence of more symmetrical circular harmonics is favored in ferroelectrics with high dielectric constants.