Premium
Ferroelectric Polarization Switching Dynamics and Domain Growth of Triglycine Sulfate and Imidazolium Perchlorate
Author(s) -
Ma He,
Gao Wenxiu,
Wang Junling,
Wu Tom,
Yuan Guoliang,
Liu Junming,
Liu Zhiguo
Publication year - 2016
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201600038
Subject(s) - nucleation , triglycine sulfate , materials science , chemical physics , ferroelectricity , polarization (electrochemistry) , bond energy , anisotropy , ionic bonding , electric field , condensed matter physics , crystallography , chemistry , molecule , optics , optoelectronics , ion , thermodynamics , physics , organic chemistry , dielectric , quantum mechanics
The weak bond energy and large anisotropic domain wall energy induce many special characteristics of the domain nucleation, growth, and polarization switch in triglycine sulfate (TGS) and imidazolium perchlorate (IM), two typical molecular ferroelectrics. Their domain nucleation and polarization switch are rather slower than those of conventional oxide ferroelectrics, which may be due to the weaker bond energy of hydrogen bond or van der Waals bond than that of ionic bond. These chemical bonds dominate the elastic energy, with the latter being an important component of domain wall energy and playing an important role in domain nucleation and domain growth. The ratio of anisotropic domain wall energy to Gibbs free energy is large in TGS and IM, which allows a favorable domain shape and a special domain evolution under a certain electric field. Therefore, this study not only sheds light on the physical nature but also indicates the application direction for molecular ferroelectrics.