dc.contributor.author | Walker, Julian | |
dc.contributor.author | Miranti, Rany | |
dc.contributor.author | Skjærvø, Susanne Linn | |
dc.contributor.author | Rojac, Tadej | |
dc.contributor.author | Grande, Tor | |
dc.contributor.author | Einarsrud, Mari-Ann | |
dc.date.accessioned | 2020-09-07T08:50:41Z | |
dc.date.available | 2020-09-07T08:50:41Z | |
dc.date.created | 2020-02-20T12:18:55Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 2050-7526 | |
dc.identifier.uri | https://hdl.handle.net/11250/2676584 | |
dc.description.abstract | Ionic plastic crystals are part of an emerging class of hybrid organic–inorganic ferroelectrics. The combination of low dielectric constants (<20), strong piezoelectric coefficients (>100 pC N−1) and low temperature synthesis make ferroelectric plastic crystals strong candidates for sensing and energy harvesting applications so more research of the electrical properties, such as dielectric loss and super-coercive hysteresis is needed. Tetramethylammonium bromotrichloroferrate(III) was studied as a prototypical material and a non-centrosymmetric orthorhombic Amm2 structure was confirmed by X-ray diffraction at room temperature. The relative permittivity was below 20 at high frequencies (105 Hz) but high dielectric losses at frequencies <103 Hz caused the permittivity to increase. The bulk material showed super-coercive hysteresis with remanent polarizations of 3.8 μC cm−2 and peak-to-peak strains of 0.046%. The coercive field and peak-to-peak strain exhibited frequency dependence, reducing from >80 to 30 kV cm−1 and 0.046 to 0.017% respectively between 100 and 0.1 Hz. At 100 Hz the material exhibited a strong asymmetric hysteresis that was reversible depending on the electric field direction. The observed behavior was consistent with a defect pinning model of ferroelectric switching behavior and thus some likely point defect species were proposed and thought to result from solution non-stoichiometry or residual moisture and solvent. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.title | Super-coercive electric field hysteresis in ferroelectric plastic crystal tetramethylammonium bromotrichloroferrate(III) | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.source.journal | Journal of Materials Chemistry C | en_US |
dc.identifier.doi | 10.1039/c9tc06918f | |
dc.identifier.cristin | 1796078 | |
dc.description.localcode | © 2020. This is the authors' accepted and refereed manuscript to the article. Locked until 31.1.2021 due to copyright restrictions. The final authenticated version is available online at: http://dx.doi.org/10.1039/c9tc06918f | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |