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Directionally tunable and mechanically deformable ferroelectric crystals from rotating polar globular ionic molecules

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Title: Directionally tunable and mechanically deformable ferroelectric crystals from rotating polar globular ionic molecules
Authors: Harada, Jun Browse this author →KAKEN DB
Shimojo, Takafumi Browse this author
Oyamaguchi, Hideaki Browse this author
Hasegawa, Hiroyuki Browse this author →KAKEN DB
Takahashi, Yukihiro Browse this author →KAKEN DB
Satomi, Koichiro Browse this author
Suzuki, Yasutaka Browse this author →KAKEN DB
Kawamata, Jun Browse this author →KAKEN DB
Inabe, Tamotsu Browse this author →KAKEN DB
Issue Date: Oct-2016
Publisher: Nature Publishing Group
Journal Title: Nature chemistry
Volume: 8
Issue: 10
Start Page: 946
End Page: 952
Publisher DOI: 10.1038/NCHEM.2567
PMID: 27657871
Abstract: Ferroelectrics are used in a wide range of applications, including memory elements, capacitors and sensors. Recently, molecular ferroelectric crystals have attracted interest as viable alternatives to conventional ceramic ferroelectrics because of their solution processability and lack of toxicity. Here we show that a class of molecular compounds-known as plastic crystals-can exhibit ferroelectricity if the constituents are judiciously chosen from polar ionic molecules. The intrinsic features of plastic crystals, for example, the rotational motion of molecules and phase transitions with lattice-symmetry changes, provide the crystals with unique ferroelectric properties relative to those of conventional molecular crystals. This allows a flexible alteration of the polarization axis direction in a grown crystal by applying an electric field. Owing to the tunable nature of the crystal orientation, together with mechanical deformability, this type of molecular crystal represents an attractive functional material that could find use in a diverse range of applications.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 原田 潤

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