10.1021/jacs.7b13688.s002
Kensuke Kobayashi
Kensuke
Kobayashi
Sachio Horiuchi
Sachio
Horiuchi
Shoji Ishibashi
Shoji
Ishibashi
Youichi Murakami
Youichi
Murakami
Reiji Kumai
Reiji
Kumai
Field-Induced
Antipolar–Polar Structural Transformation
and Giant Electrostriction in Organic Crystal
American Chemical Society
2018
strain
hydrogen-bonded chains
polarity
crystal structure analysis
synchrotron X-ray diffraction
antipolar
antiferroelectric 2- trifluoromethylnaphthimidazole crystal
giant electrostriction
transition
2018-03-05 00:00:00
Dataset
https://acs.figshare.com/articles/dataset/Field-Induced_Antipolar_Polar_Structural_Transformation_and_Giant_Electrostriction_in_Organic_Crystal/5965399
The field-induced antipolar–polar
structural transition
in an organic antiferroelectric 2-trifluoromethylnaphthimidazole crystal
is investigated by performing synchrotron X-ray diffraction. The polarities
of all of the hydrogen-bonded chains become parallel with each other
in the presence of an external electric field. The switching is accompanied
by a giant electrostriction, which provides 1 order of magnitude larger
strain than the piezoelectric strain of the organic ferroelectrics:
croconic acid and poly(vinylidene fluoride); however, it is comparable
to those of typical commercial piezoelectric ceramics. The crystal
structure analysis with electric field shows that the origin of the
observed giant electrostriction can be attributed to the shear strain
that emerges from the polarity switching of the hydrogen-bonded chains.
The antipolar–polar structural transition in antiferroelectrics
could be employed for the development of high-performance electrostrictive
organic materials.