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Plastic/ferroelectric molecular crystals : Ferroelectric performance in bulk polycrystalline forms

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Title: Plastic/ferroelectric molecular crystals : Ferroelectric performance in bulk polycrystalline forms
Authors: Harada, Jun Browse this author →KAKEN DB
Issue Date: 1-Feb-2021
Publisher: American Institute of Physics (AIP)
Journal Title: APL materials
Volume: 9
Issue: 2
Start Page: 020901
Publisher DOI: 10.1063/5.0039066
Abstract: Plastic crystals are a class of compounds composed of small molecules with globular structures. Plastic crystals exhibit various unique features, most of which arise from the rotator motion and orientational disorder of the constituent molecules. We recently discovered that some plastic crystals exhibit ferroelectricity in lower-temperature phases, including the room-temperature phase. The crystals, i.e., plastic/ferroelectric molecular crystals, have demonstrated several unique features that differ from conventional molecular ferroelectrics. In particular, the materials have achieved ferroelectric performance for the first time as bulk polycrystals of small-molecule crystals. These features are attributed to the multiaxial ferroelectricity and facile preparation of monolithic bulk polycrystals, which are impossible to achieve for conventional molecular crystals. Numerous related molecular ferroelectrics have been developed, rendering plastic/ferroelectric crystals an emerging class of molecular ferroelectrics. In this perspective, we have outlined the development and unique features of plastic/ferroelectric molecular crystals, focusing particularly on their ferroelectricity and related properties in bulk polycrystalline forms.
Type: article
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)

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