Design and Prominent Dielectric Properties of a Layered Phase-Transition Crystal: (Cyclohexylmethylammonium)2CdCl4
| Autor: | Xing-Hui Lv, Heng-Yun Ye, Zhong-Xia Wang, Peng-Fei Li, Chen-Yu Mao, Wei-Qiang Liao |
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| Rok vydání: | 2016 |
| Předmět: |
Phase transition
Materials science Condensed matter physics 010405 organic chemistry General Chemistry Dielectric 010402 general chemistry Condensed Matter Physics 01 natural sciences Ferroelectricity 0104 chemical sciences Crystal Crystallography Differential scanning calorimetry General Materials Science Dielectric anisotropy |
| Zdroj: | Crystal Growth & Design. 16:3912-3916 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.6b00480 |
| Popis: | Following our recent finding of interesting dielectric and ferroelectric properties in semiconducting organic–inorganic layered perovskites (benzylammonium)2PbCl4 and (cyclohexylammonium)2PbBr4–4xI4x (x = 0–1), we designed a new layered perovskite-type crystal (cyclohexylmethylammonium)2CdCl4. By systematic characterizations, including differential scanning calorimetry measurements, dielectric measurements, and variable-temperature structural analysis, this crystal was found to undergo a reversible first-order phase transition at around Tc = 342 K. The origin of the phase transition is associated with the order–disorder change of the organic cation as expected. The phase transition is accompanied by the anticipated large dielectric constant change and remarkable dielectric anisotropy. These dielectric performances reveal potential application of the crystal as a high-temperature dielectric material. More interesting dielectric crystals are expected to be tailored in the future by taking advantage of the r... |
| Databáze: | OpenAIRE |
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