Visualization of ferroelectric domains in a hydrogen-bonded molecular crystal using emission of terahertz radiation
Using a terahertz-radiation imaging, visualizations of ferroelectric domains were made in a room-temperature organic ferroelectric, croconic acid. In as-grown crystals, observed are ferroelectric domains with sizes larger than 50-μm square, which are separated by both 180° and tail-to-tail domain wa...
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Veröffentlicht in: | Applied physics letters 2014-07, Vol.105 (4) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Using a terahertz-radiation imaging, visualizations of ferroelectric domains were made in a room-temperature organic ferroelectric, croconic acid. In as-grown crystals, observed are ferroelectric domains with sizes larger than 50-μm square, which are separated by both 180° and tail-to-tail domain walls (DWs). By applying an electric field along c axis (the polarization direction), a pair of 180° DWs is generated and an each 180° DW oppositely propagates along a axis, resulting in a single domain. By cyclic applications of electric fields, a pair of 180° DWs repeatedly emerges, while no tail-to-tail DWs appear. We discuss the usefulness of the terahertz-radiation imaging as well as the observed unique DW dynamics. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4890939 |